I would probably kill a guy if he cheated on my lil sis or a girl if she cheated on my lil brother....the truth is she is a grown woman. As her brother, offer her advice, love, and comfort. But killing him, beating him, wont do any good.....(you can threaten him

) As much as it might hurt you, you have to let her be an adult, and handle her adult decisions.

__________________
My Ex-husband SKULL-BUITRE ran off to Colombia with OUR money and screwed me after I helped him build OUR business.
He is hiding in Colombia and never paid the settlement $ from our divorce!