"You don't want to touch her..."

When I was 16, I was molested by a guy I had known for years, and he gave me an incurable STD.

One night, after this had occurred, I went out with my sister and a guy she was dating. 

Somehow the topic of threesomes came up, and I noticed my sister texting her date: "You don't want to touch her because she's dirty."

To this day, I can't bring myself to tell my sister that what she said killed me a little inside.