What is it like to have a hot sister...

What about your brother? You and he ever get it on? I have know a few twins who have done so. Kinky.

True story.

What is an MTOS anyway?

How did she become involved in your life in the first place? And how did you then discover she was your sister? When she blew you when you were 19, did you know she was your sister (2 years ago)? Because you said you made out with her before you knew she was your sister, and that that happened when you were 17. So two years later, when she gave you head, did you know it was head from sis? I’m not totally following the timeline here…

It’s like having an ugly sister.

When my sister and I were teens, more than a couple of my friends told me my sister was way hot. I didn’t see it.

Just a gut feeling but I’m betting she’s a step sister - probably attracted to her before the parents were. Talk about cock blocking though…

As near as i can figure - Member Of The Opposite Sex.

Wiki on thethe Westermarck effect

That’s what I want to know. Or is it an acronym that has died in the last eleven years?

MTOS Major Trauma Outcomes Study

Ah. That makes sense, thanks.

Although, I would have used MOTOS.

I’m going to close this seeing how it’s 11 years old.
Feel free to start a new thread about the OP if anyone wants to renew discussion in this topic.