Let me just preface this by saying I have a thing for tall girls, but up until recently, I've never had a thing for my sister.
My younger half sis (different dad, whose family are literally all giants) is 6'0-6'1 and I'm 5'6. The other night she came home from a party and I was in the kitchen and we started chatting. She was wearing heels and I was barefoot and she was way taller than me. I started getting hard because she was towering over me, however I feel really ashamed and I don't want to be attracted to my sister...what do I do?
Do whatever you feel like man.
It's probably going to suck getting cuck'd by your girlfriend AND sister at the same time.
Fuck her anon, do some kinky incest if you're both up to it
I had a thing for my cousin, I got over it.
You will too.