So we're close, as family would be, but now he's gone and done something even I abhor. Last week my brother cheated on his girlfriend, and what's worse he said it was the best sex of his life. Now that man likes sex, and has had plenty more partners than I have, but he's never actually cheated on anyone before and really I don't know how to react... He said it was a one-time thing, and I believe him, but he doesn't want to hurt his girlfriend and has finalized that he isn't telling her. I asked if he wrapped up and he said yes, so no STD problems hopefully will arise, but what I want to ask is if anyone else has dealt with a persons' "cheatin' heart"? He knows I don't condone it but all the same I don't want to get too involved, you know? How would you handle this?