Need To Leave

I have been contemplating moving down south with some buddies. I have a good life here but I have not been the a good friend. My best friend who I have known since we were in middle school has been married to a thick girl named Angelina. They met a few years back dated and got married. No kids yet we hang out together a lot.
We often hit the bars then head back to either my home or there place. About 6 months ago after we had all gone drinking by buddy was way drunk and past out at my place. Angelina and i where talking she is half Mexican half Italian has mega size tits bleach blond hair hazel eyes and a thick curvy bottom. She has a bit of a tummy but not fat. Just a really curvy women. I helped her trying to get my buddy up. We ended up covering him and while trying to get him up and struggling with him. She was leaning over when her tit popped out of her shirt. My good her nipples were big and thick. I didn’t say anything and finally pointed it out. With all the booze we had drank I jokingly took my finger tip and pushed on her nipple. She didn’t stop me and that turned into my finger tips rolling her nipple between my fingers. She kissed me I kissed her I took her inside the house and we fucked each others brains out. She slept on my bed and when we woke the next morning i woke up to her giving me a sloppy blow job. After swallowing as much as she could she hopped in the shower. I saw her naked and we had round 2 in the shower. No condoms where used we didn’t talk about what happened.
A week went by when on the following Saturday she came over to talk. It started as we could never do this again to her on her knees and we didn’t all over again that evening. We even met up later in the evening with my buddy. She left my house went straight to the bar and i followed her there. It had been less then a half hour since we had been together. She insists on no condoms and freaks out when i mentioned to them that I was considering headed down south with my cousins for a bit to get a change of scenery. They spent the night again my buddy got sloppy drunk and passed out. Angelina begged me not to leave and that night enticed me by giving me her anal virginity. It was always been a hard no and that night she gave it up to me. She cried a bit was loud but we used a lot of lube and by the end of the night with some pain she was taking some deep strokes in her anus. It was really dirty sex. Hot but dirty so hot that the women licked me clean. Not sure hot to approach this. I know it’s a fucked up thing to do. I feel horrible and confused