Anal with sister

I woke up to my sister licking my dick, she deepthroated me and told me she wanted me to fuck her ass. I ripped her panties off and ate her ass out, eventually I was in her ass and she said it felt like she was taking a massive shit. We fucked for a long time and when I came in her she said she had to shit and if I pulled out she would let loose. She used this to keep me in her so I walked with her to bathroom and we both sat down. She took a shit while I was fucking her ass and it felt amazing