...or was Rachel? There's an episode Rachel wants a break due to Ross being jealous of her colleague Mark, and he goes out, gets drunk and messes around with another woman.

The next morning Rachel, wants to get back with him, and after she is told that he was with the other woman, she feels he “cheated” and it’s a mess.

Did Ross cheat on her since it wasn’t an official break up or was it OK for him to sleep with someone during the 10 hours they were on a break?