The Triadic Core
By Chris Jones
In recent articles, we have explored several dimensions of deceptive sexuality trauma. We examined the acute trauma that often occurs at the moment of discovery, the longer-term process of complex trauma shaping, and the trauma responses and safety-seeking behaviours that betrayed partners frequently experience.
Many of these dynamics are not unique to sexual betrayal. Similar patterns could emerge in other situations where a partner maintains a hidden, compartmentalised reality. For example, if one person in a relationship secretly accumulated large gambling debts or concealed serious financial problems, the deception and manipulation involved might be similar in many ways.
Deceptive sexuality trauma, however, carries a unique and particularly painful dimension. Sexual betrayal often wounds the most deeply personal aspects of human identity, making its impact especially profound. To help explain why this type of betrayal can be so devastating, the DST model introduces the concept of the triadic core.
What Is the Triadic Core?
The triadic core refers to the overlap of three deeply personal dimensions of human identity:
- Sexuality
- Gender
- The physical body
These three elements form a central core of what it is to be human. They are closely tied to our sense of identity and self-worth.
Within the DST model, we describe these parts as “the three most sensitive tissues of the human psyche.” Each of these areas is particularly vulnerable to experiences of shame, humiliation, and violation. When harm occurs in these domains, the wounds can be especially deep and long-lasting.
Why These Areas Are So Sensitive
Most people reading this can probably intuitively recognise how sensitive these aspects of identity are. A significant amount of the harm, violence, and abuse that people experience across many contexts is linked to these parts of the self – particularly when we consider gender-based harm and sexual abuse.
For many individuals, memories of adolescence also highlight how psychologically vulnerable we are in these areas. Questions about masculinity, femininity, desirability, physical development, and sexual identity often bring intense feelings of comparison, insecurity, embarrassment, or shame.
Even later in life, these aspects of identity remain deeply personal and often difficult to discuss openly. Cultural norms frequently treat sexuality and gender issues as taboo subjects, which can make authentic communication about these parts of ourselves very difficult.
We might also grow up receiving mixed or restrictive messages from caregivers, family systems, or cultural/religious systems about sexuality, gender, and the body — messages that encourage silence, shame, or avoidance rather than openness and understanding.
As a result, individuals might reach adulthood without a clear or healthy language for expressing or integrating these parts of themselves. When something painful or confusing occurs in these areas, people may struggle to voice or process their experience, leaving important aspects of their inner world hidden, and leaving these parts heavily constricted and suppressed.
This creates a certain irony: although sexuality, gender, and the body sit at the very core of human identity — and are therefore fundamental aspects of every person — they are often the parts people feel least able to discuss openly. These deeply personal aspects of the self are consequently even more sensitive and vulnerable to injury.
These vulnerabilities help to explain why sexual betrayal can have such a profound impact.
How Deceptive Sexuality Targets the Triadic Core
When sexual betrayal occurs within an intimate relationship, the impact often lands directly on these most sensitive parts of the self. Unlike other forms of deception, sexual betrayal can create wounds that affect how a person experiences their sexual identity, their gender identity, and their relationship to their own body.
These injuries can also be particularly difficult to heal because they strike at the core of personal vulnerability, where wounds often run deep. In many cases, these areas of identity may already carry earlier sensitivities or unresolved wounds.
With this in mind, we can now consider how each part of the triadic core may be directly impacted.
Sexuality
The first element of the triadic core is sexuality.
Because the betrayal itself involves sexual behaviour, it is likely to have a direct impact on the partner’s sexual identity and sexual experiences. For many partners, the discovery of a secret sexual reality profoundly disrupts their relationship with sexuality. What was once experienced as a space of intimacy, connection, and vulnerability can become associated with betrayal, comparison, and emotional pain. As a result, the partner’s ability to experience sexuality in a healthy and safe way may be significantly affected.
Some individuals experience sexual shutdown or sexual aversion, finding physical intimacy uncomfortable or even distressing. Physical touch may trigger anxiety, disgust, or emotional withdrawal. Others may continue engaging in sexual activity but find that it is accompanied by intrusive thoughts, disturbing mental images, or flashbacks related to what occurred in the secret sexual basement. These reactions can make it extremely difficult to experience sexuality as pleasurable or relationally connecting.
In many cases, these responses resemble symptoms commonly observed in survivors of sexual trauma. Experiences that were once associated with closeness and affection may become intertwined with feelings of humiliation, comparison, or inadequacy.
Partners may also struggle with feelings of contamination or violation, particularly if they discover that their partner engaged in sexual behaviours outside of the relationship whilst continuing sexual intimacy at home. There may be genuine fears about exposure to sexually transmitted infections, alongside painful beliefs that they were somehow not attractive enough, desirable enough, or sexually adequate.
For some individuals, another painful realisation emerges when they look back over the course of the relationship. They may feel that a healthy sexual life was quietly taken from them without their knowledge or consent. This can be especially painful if there had been periods of sexual withdrawal or distance within the relationship, which they may now understand in a completely different light. The intimacy they believed they were sharing may have been shaped or overshadowed by a hidden sexual reality, leaving them with a deep sense of loss about what their sexual relationship might otherwise have been.
Gender
The second element of the triadic core is gender.
Whilst both men and women can build and maintain secret sexual basements, the vast majority are built by men, with the traumatic consequences most often borne by women and children. Although this pattern is not universal, it is common enough that deceptive sexuality can often be understood within the wider context of gender-based harm.
For many women, the discovery of long-term sexual betrayal can profoundly affect their sense of gender identity and the roles they have inhabited in life. Many individuals place deep meaning in identities such as partner, wife, or mother. When betrayal occurs, those identities can feel diminished or undermined. The sense of being valued within the relationship may be shaken, particularly if the partner realises that while she was investing deeply in the relationship and family system, her spouse was secretly pursuing sexual gratification elsewhere.
This experience can lead to painful comparisons with other women and to feelings of insecurity about attractiveness, desirability, or adequacy. Partners may begin questioning how they measure up to the people or images connected to the secret sexual basement, often interpreting the betrayal through the lens of personal deficiency.
In some cases, the betrayal can also reshape broader perceptions of gender and power. Individuals may become more aware of dynamics of exploitation, entitlement, or imbalance that they had not previously considered. This shift in awareness can affect how they view men, relationships, and even wider social structures.
As a result, trust in men, intimate relationships, or social systems may be significantly affected, adding another layer to the complex emotional and relational impact of deceptive sexuality trauma.
The Physical Body
The third component of the triadic core is the physical body.
At first glance, this aspect may seem less obvious than sexuality or gender. However, modern trauma research increasingly demonstrates that trauma is not purely psychological; it is also physiological. Traumatic experiences affect the nervous system and can leave lasting imprints on the body itself.
Many people are familiar with this idea through the title of Bessel van der Kolk’s influential book, The Body Keeps the Score. Trauma can manifest physically in a variety of ways, including chronic stress responses, immune system disruption, sleep disturbances, digestive problems, and a wide range of other health conditions. When the nervous system remains in a prolonged state of hyperarousal or dysregulation, the body is often placed under significant strain.
Trauma survivors may also experience a sense of disconnection from their bodies, sometimes associated with dissociation or emotional numbing. In an attempt to cope with overwhelming emotional pain, individuals may become detached from bodily sensations or develop a diminished sense of physical presence.
For betrayed partners, the physical body can also become another source of painful comparison. Individuals may compare their appearance to the people involved in the secret sexual basement, leading to heightened body-image concerns or feelings of inadequacy. The partner may begin scrutinising aspects of their own body — their age, weight, or attractiveness — through the lens of the betrayal.
The trauma itself can also affect daily physical functioning. Eating patterns may change, sleep may become disrupted, and energy levels may fluctuate significantly. Some individuals may require medication to help manage symptoms such as anxiety, depression, or sleep disturbances, which can introduce additional physical side effects.
Taken together, these dynamics highlight how deceptive sexuality trauma can impact not only the emotional and relational world of the betrayed partner, but also their embodied experience of themselves. The body becomes another place where the consequences of betrayal may be felt and processed.
Understanding the Depth of the Injury
When we consider these three dimensions together — sexuality, gender, and the physical body — we begin to see why sexual betrayal often carries such a profound impact, even beyond the acute and complex trauma that we’ve already looked at. It reaches into the most vulnerable and identity-defining aspects of the human psyche.
It also reminds us that the reactions of betrayed partners — including distress, insecurity, anger, and grief — are not exaggerated or irrational. They reflect wounds that reach into some of the most sensitive aspects of human identity.
In Conclusion
The concept of the triadic core offers another lens through which we can understand the devastating impact of deceptive sexuality. By recognising how sexual betrayal affects sexuality, gender identity, and the physical body, we can approach this topic with greater empathy, and a clearer understanding of what the healing journey might look like for partners impacted by deceptive sexuality trauma.
If you’re interested in learning more or would like to explore support options, please feel free to get in touch.