OP, I've really wavered over whether to post this or not, as I don't want to add to your hurt, but I'm going ahead as I was cheated on and it helped me to do this. I remember one evening with a good friend shortly after I found out - and I dumped him immediately by the way, to me it's a non-negotiable dealbreaker to cheat in any way - but we found a funny side to it. It ended up with us giggling over a mental image of her giving him a blow job while he was eating soup from a bowl balanced on her head. It took a lot of the power out of the mental images I was otherwise suffering from, and made them both the pathetic fools they are.
I'm so struck by his utterly ridiculous description of what happened as a 'tantric massage'. I'm seeing Eddie from Ab Fab wafting around in a Kaftan holding incense sticks and doing a sort of interpretive dance round the massage table. With a voice over in an M&S advert voice saying, 'This is not just any wank, this is a tantric wank'. It's comical really, his sad little attempt to justify it to himself then and now as something 'higher' than a wank from a prostitute, which is all it really was. What he did is not funny, but his stupid thoughts about it and the set dressing and pretence that went with it, is. What a sad little man he is.
You don't have to decide anything right now. You don't have to plan for anything right now. You don't have to see him right now. You don't have to agree to anything right now. Longer term, you may stay together, you may not. You are not obliged to 'try' anything if you don't want to. Listen to your gut reaction but you can't worry about all that for the moment. Concentrate on getting well and your baby.
I agree that all the tears/apologies don't mean jack shit. He would never have felt sorry if he'd not been caught out. He would have continued thinking it was all just a harmless little thing he did.
He is presenting it as if he only had two choices. Cheat on you by having an affair, or visiting a prostitute, and he felt the prostitute was less damaging. Actually, there was a third option. How about not cheating at all and having a quiet little wank, like most men would do? That's a very worrying mindset he has.