Misplaced anger much? Or blatant stupidity. Either one. Or both.

Some parents nowadays, they think they're still the boss of you even after you move out. I'm sure you didn't listen to her and I'm sorry that your father is doing that.

Denial - not just a river in Egypt. Can also be a powerful distorter of reality.

1) It is possible that he could've been masturbating with a condom on, but usually younger, less experienced men do that to get used to getting off while having a condom on so they are more inclined to use condoms during sex- because condoms do, in fact, make sex a bit less pleasurable for both parties. But, seeing how OP's dad is married, had been for a while and has been having sex for as long, he probably was not using it while pleasuring himself. 2) It could also be possible that maybe you mother could be having an affair? It seems very strange to me that you and your boyfriend live alone, yet she blames you. "You doth protest too much". 3) What I think really happened, though, is that your father is having an affair but maybe he purposely placed the condom in hopes that your mother would blame you? They have been married for a while, I assume, so perhaps he would know that she would make the conclusion. What you have to do, though, is sit her down and honestly tell her you think he is cheating. She raised a child with him and he broke his vows and their trusts. She deserves to know. 4) You're 22 and live with your boyfriend, how exactly are you not going to see each other anymore? It's not like you're a teenager living at home. Even if your father predicted it, I think it's very strange that she jumped to that conclusion. Have you stayed at your parents house recently or something? I assume not, because that would've been good information to put in the FML since in such case her thinking would make a bit more sense. Good luck to you and you family, OP!

Has anyone considered it may be the Mom overreacting because she knows who was really wearing the condom? The mom may be having the affair and she's trying to throw suspicion away from herself.

Maybe the husband jerked off wearing a condom.

Yeah, because you and your boyfriend WENT to THEIR house just to have SEX in THEIR BED and leave a USED CONDOM on their nightstand

Your mother can't tell you to do anything. Do your own thing your own way. You have all the right to do what you want when you're older than 18.

I wonder why your mom chose to blame you instead of thinking the obvious.

It's probably a good idea to distance yourself from your mom until she comes out of her denial. You're not responsible for your fathers mistakes or your mothers issues and they both need to realize that and deal with the problems now facing them.