You are in an awful situation - probably the worst you'll ever find yourself in (hold that thought and take a breath...)
Ask him to move hotel or at least move rooms to give you space.
Tell him that if he talks about suicide again, you will ask reception to organise a Doctor as you are not a medical professional and would rather leave it to the experts.
Do NOT talk to OW. She will be all 'Sorry, it just happened' and that's bullshit. We are in all in charge of our choices and narratives. All she wants to do is offload guilt and potentially stop you from speaking to her husband. Hold your power by refusing to engage with her.
Detach. Tell your H that clearly there is no coming back from this but you need time and space to process. You are not interested in his whining, self-preservation, reputation or mental health. You are prioritising yourself and he needs to respect that (seeing as he has respected nothing else).
He will be pressing you to commit to decisions. Let's not tell people yet/don't tell family/try again/ blah blah blah. DO NOT COMMIT TO ANYTHING.
Allow your feeling to just surface and come. Anger, pain - all of it. Just feel what you need to.
One day at a time.
Tomorrow you may feel like calling a friend - so call. You may feel like staying in the room - so stay. Do whatever feels bearable.
You WILL come out the other side.
He is a cunt.
x