Would you have a threesome with a sibling?

I've had guys ask to 3some with me and my sis a lot. We've given it a try a few times.

Yes, that is perfectly fine. Me and my siblings banged all the time.

If I had a brother that looked like this https://www.pinterest.com/pin/462815299183061688/

I just threw up a little.

my sister initiated it

my sister and I once got naked with her girlfriend and felt each other up.

It was when I was 18. They were 17 & 19

33 & 35. What Do you mean up there?

I have two.

I just grabbed her hand and moved it down there then she did the rest

Well she gave me a handjob once, so I'm hopeful

My sister sucking me off while someone bangs her from behind is actually one of my fantasies

Same sex siblings, normal. Opposite sex siblings, weird.

No.

There's no way in hell I'd ever do that.

No, it would be hella weird.