They WERE on a break. I don't think that was the issue. The issue was that Ross slept with the photocopier girl 3 hours after they went on said break.
!
Like it wasn't even a break UP. If it's legit all the way over, sleep with whom you want when you want - but if the phrase "on a break" is used which clearly implies the resumption of the relationship? Nah, not that fast gurl.