Was i wrong my sister bf tired to hit on me.?

Before this he (twin bf) smacked my butt and said he thought it was my SIS when I'm smaller then her. I told her. Ok my twin sister bf who is married change my spare tire. Then I gave him my number but it wasn't nothing like that cuz we hang out and my twin knws. It was nothing serious because she looks much older guys. I don't so they left she went to work a knock at my door it was him. He said he wanted to look at my rim and take me to get another so follow him I did. The place didn't have it so. He said he would give me the money. I'm like ok he gave me 100$. I said i would gave it back to him. Cuz I didn't want him to think I owe him. I didn't wanna cuz I didn't wanna hurt her. The came came back ova that nite my SIS was there. I didn't tell her her. They left and he calls me talkn bout he wats to sleep with me. When he sleeping with my twin he sees me. I told him no and I will give him his money. I told my bf he said he said I need to tell her or he will go to him. So I told my SIS in a childish way I will amit. She starts cryn and call him. She was mad he gave me money and she dont none. I gave my SIS the money he gave me and 100 extra. 5 months later she said I brought that on myself. So she takes him back and continue to sleep with him. I was shocked cuz if my bf did that I would have left him. Now she's saying I disrecpted her. I'm like he's married he got fired from his job from for sexual assault. She like I'm not a women. I'm like if you felt that way why take da money and ashy this long. Don't smile in my face and know you feel that why that's fake. I told her you should have left him alone. She said it was good so so didn't. We have a place together I told her no ***** comes between us. But he did now I don't say nothing to her. And wanna move out. I knw I was wrong for taking the money. Then she said I should have called her she should have checked him