Ah, the rebound. One issue with the rebound is this: usually one person starts to get greater feelings for the other, and there’s a bit of an imbalance. Another issue is that you may constantly compare your rebound to your ex. A third issue is that a rebound may metastasize into a relationship for which you aren’t ready. However, if the sex is healing and fun and you’re enjoying yourself, I’d stick with it. Don’t worry about whether it’s a real love connection or not. Time will tell.