Just found out My boyfriend is Sleeping with my Sister!

I'm so sorry to hear you've been so betrayed. First off - as you already said the "boyfriend" needs to go. He's obviously useless and needs to be sent on his pathetic way. Now as far as your sister that a tough one. Blood is thicker than water. You both really need to talk (obviously) but not until you're ready because it will just become a bigger mess that it already is and then you may not be able to salvage your reltionship at all. How old is your sister? You may have to consider some type of family counseling to mend this relationship - if it can be done.

Release madness.... subside yourself.. take deep breath. It's not end of world. Such a things can happen and You aren't the only one...You have time to thinking about it . Don't be mad on your sister, You can be mad only on Your boyfriend and that's it. Since Your boyfriend proove now who is it think about it that You found out his habbit and thank to God that you are not marriaged with him.

oh its too bad...

Your sister is your blood, forever. I cant imagine this. I would be furious. Boys come and go but sisters are forever. It would be a long time before I forgave her I know that much!