Slut Shaming My BBW Big Tit Sister Pt1 bigtits undercoversluts

So open up a group text with me and all my homies, and theyre ragging on me for having a slut as a sister. I knew she had a reputation around town, but the stories they were telling me turned my stomach. I about had it when they started sharing nudes of her in the group text. Apparently she just goes around sucking dicks indiscriminately. When I went to confront my sister, she wanted to argue in her bra and panties. I tried to reason with her, but uh... shes pretty down with being a dirty slut and doesnt seem to have any shame at all. ,