OP I have been reading your thread and what’s happened to you has reminded me of a case a few years back where judges ruled that a man can be convicted of rape despite the sex being originally consensual.
I hope the following link is helpful, (but I apologise in advance if causes you any distress):
metro.co.uk/2013/04/24/sex-with-consent-can-still-be-rape-3665975/
The case was about withdrawal as a method of contraception but I think the principle is the same. The terms of your relationship with this man are that you only have (consensual) sex and that a condom must be used.
That means you can consent to sex as many time as you like, knickers or no knickers, nightie or no nightie, but if he does not wear a condom, knowing that you want him to, this is a violation of your terms and negates any original consent given.
In the first case he outrightly forced you, in the second, at best, I would say he manipulated the situation so he could have (force) sex without a condom. In fact, he probably did outrightly force you, as you said he grabbed your stomach.
In both cases he has violated the terms which has caused you great distress and no doubt a lot of pain. You do not deserve to be treated like this, and none of this is your fault. Please remember that.
He has said some disgusting things about you and your body and I can only assume that deep down he must hate himself. What a pathetic individual he is.
Im glad you’ve left and and are at your friends. Do ignore the antiquated mother, and give her very little information from now on about what happened. She shouldn’t have come into your room and made you re-enact the scene. Again, you don’t deserve to be treated like that either. Look after yourself, and remember that none of this, not one bit at all, is your fault.