i didn't read the prior story, but i did the same thing. i was starting to get over my ex and then i gave in and let him talk to me and then we slept together, despite the fact that he has a gf...he said i couldn't tell neone cuz it would devastate her. it wrong, in ur case and mine, as well as our exs'. it shouldn't be done again, and u should keep it a secret. it's not ur relationship, it's her's. let her live w/the guilt. u can tell her what u want...i told my ex not to bother calling me unless he were single because i knew it just made it difficult to not mess around and i didn't have to worry about getting reattached. don't go to her, let her come to u.