The Choice You Never Gave Them: Affairs, Consent, and Your Partner's Body

An honest letter to the partner keeping the secret.

Part 2 of 3 in the series What the Secret Takes.

There's a part of infidelity almost no one talks about, and after many hours of sitting with couples, I think it needs saying plainly.

When you have sex outside your relationship and don't tell your partner, you are doing more than keeping a secret. You are making a decision about their body without their knowledge. Every time they are intimate with you afterward, they are being exposed to a risk they were never told existed and never got the chance to weigh. They don't know there's something to consider. They don't know there's a choice to be made. You made it for them, silently, the moment you chose not to tell them.

That is not a private failure that only affects you. It's a decision about someone else's health, made on their behalf, without their consent.

Why is this a question of consent?

I don't use that word lightly, and I know it will sit uncomfortably with some people reading this. But consent isn't just the "yes" in the moment. It's an informed yes. A yes given with the knowledge needed to actually choose. When that knowledge is withheld, what follows isn't really consent, however willing the other person seems.

In my field, we have a lot of language for betrayal trauma, for the shock of discovery, for the attachment injury an affair causes. We have almost no language for this part of it, for what it means that someone's body was put at risk by a decision they never got to make. That silence, in our profession, is itself a problem.

I want to be clear about what I'm not saying. I'm not saying people don't make mistakes, or that every affair is some calculated act of cruelty. Most aren't. Most come from loneliness, from numbness, from wanting to feel something again. I understand that humanity, and I hold it with compassion every week in my practice. But understanding why something happened doesn't change what it does to the person on the other side of it. And this part, the part about their body and their right to choose what happens to it, doesn't get to hide behind the explanation.

So if you are in an affair right now, or you were and it's still unresolved in this specific way, here is what I want to ask of you.

Should you tell your partner?

Tell them. Not necessarily every detail, not the whole story if you're not ready for that yet, but let them know there is something to test for, something to consider, something they have a right to decide about for themselves. They may not be able to handle the full truth today. They can handle knowing there is a choice in front of them that belongs to them.

How you tell them matters too. When the truth arrives in pieces, each one a fresh shock, it can do more damage than the original discovery. This is one of the conversations worth having with a therapist in the room, so that both of you are supported when it happens.

Should you get tested after an affair?

Yes, and stop having sex with your partner until you have. Speak to a doctor or a sexual health clinic about what to test for and when. Some infections take weeks to show up on a test, so a clear result soon after can be falsely reassuring and may need repeating. Until you know, don't expose your partner to a risk they haven't chosen. Not as punishment, but as the minimum respect for the fact that their body is theirs to make decisions about, not yours to decide for.

But testing is not a substitute for telling. A clear result removes a risk. It doesn't give back the choice, and the choice was always theirs.

If you're the one who has found out

If you're reading this as the partner who has discovered an affair, you don't need anyone's confession or permission to look after your own health. Getting tested is a sensible, ordinary step. It isn't an accusation, and there is nothing in it to be ashamed of. Your body is yours to make decisions about.

All of us make mistakes. I will never stand in front of a couple and pretend otherwise. But you cannot fix a mistake by taking away the one thing that was never yours to take in the first place, your partner's right to choose what happens inside their own body. Give that back to them. It's the first honest thing you can do.

If you're facing this conversation and don't know where to begin, you don't have to do it alone. You can book a session with me in Johannesburg or online via Zoom. Read more about my Intensive Affair Trauma Counselling here. And if you're already past disclosure and trying to rebuild, my affair recovery course, Repair After Affair, walks you through what comes next.

Part 1 of the series: The Reality You Were Allowed to Trust: Gaslighting During an Affair.

Part 2 (this article): The Choice You Never Gave Them: Affairs, Consent, and Your Partner's Body

Next: The Second Wound, on what happens when the ending was never real.

This article offers general guidance and isn't medical advice. For questions about testing, please speak to a doctor or sexual health clinic.