Within a relational frame, the unit of work is the relationship. The focus stays on what happens between partners and how the interaction is organised. For that work to take place, both partners must be able to remain in the interaction.

Couple therapy is not a low-intensity process. It places pressure on the system. It activates emotion, exposes patterns, and requires both partners to stay present while something different is attempted. Distress, activation, and strong emotion are not reasons to step out of the work. These are expected and actively worked with.

The threshold is reached when activation in one individual is repeatedly so high, and so difficult to regulate, that the therapeutic process itself cannot proceed. The issue is whether each person can remain present in the room and in the conversation, oriented to what is being said rather than pulled completely into what is happening internally, enough to experience something different.

In practice, this becomes visible when the process is repeatedly slowed down to provide individual support and containment. Occasional moments of this are expected and part of the work. But when it becomes the organising feature of the session, something else is happening. The therapist is no longer structuring the exchange. Too much of the session is spent trying to bring one person back within a tolerable range of intensity.

Activation may escalate into attack, collapse, withdrawal, or shutdown. The focus may still be relational, but the capacity of the individual to remain present is no longer there. An essential condition is missing: the ability to remain regulated enough to participate.

This is where individual therapy becomes necessary.

Not as a solution to the relationship, and not because one person is “the problem,” but as a way of increasing that individual’s capacity to tolerate and regulate within relational intensity. The focus shifts, temporarily, from changing the interaction to enabling participation in it.

This can take different forms.

In some cases, individual therapy is required before couple work can begin at all. The level of activation is too high, or regulation is too unstable, for the interaction to be entered in any meaningful way. The priority becomes stabilisation so that the person can later participate in the relational process.

In other cases, individual therapy runs alongside the couple work. Additional individual support helps one or both partners remain within a workable range of activation. The function is not to move away from the relational work, but to support continued participation in it.

A third form appears when couple therapy has already begun but cannot be sustained. The process is paused, and individual therapy is introduced for a defined period. The aim is to restore the capacity to re-enter the interaction so that the relational work can continue.

Across all three, the function of individual therapy remains the same. It does not resolve the relationship. It supports the individual in developing enough stability to return to, or remain within, the relational work.

Without that capacity, couple therapy becomes unworkable. With it, the work can proceed.

The decision to move into individual therapy is not made by the couple, and not driven by one partner defining the other as the problem. It is a clinical decision, based on whether the therapeutic process can be sustained.