hook up with ex

Kendall

So last month me and my boyfriend broke up but about a week ago me and him started texting at first it was just things like about our cat (who lives with me but it's both of ours) but one day it got dirty and the other day we meet up just to like talk about things (we are considering getting back together) but one thing went to another and we ended up having sex so my question is is that bad?