Best friend dating your sis behind you.

Maybe it depends on the situation. If I know that my best friend is a good guy, responsible and not a playboy, then probably I will understand it. On the contrary, I will surely break my best friend's head to wake him up!

Why wouldn't you be happy? I mean it is your family and your best friend. Don't you trust you best friend to take care of your sister? He can't be that good of a best friend if you don't trust him....I think the fact that they are hiding the relationship says that they don't think you would approve. But now it is done so you should be open about it. I would be disappointed at first that they didn't tell me but I would accept the relationship because I wouldn't want to loose my best friend. Good luck and I hope everything works out for you.

I honestly have no idea how I'd feel about that. It would be so weird. It may change how I feel towards my sister and my friend too. I think I would prefer they didn't but if they were really honestly happy I guess that would be... acceptable.