That aint no friend if he doin foul shyt like that to your blood.
We stopped being friends once he decided to fukk my sister in the first place
You really don't know what kind ve "arrangement",him and your sister might have
....or your sister may have cheated on him a million times first,or her sex game simply ain't shyt
If we sum how happened to be cool even after he got with my sister,you gotta give him the opportunity to tell your sister first....and make sure you let your sister know you forced him to tell so he don't get no extra credit for his honesty