What does it mean (I'm not English native) ?

[Jimiherf]

I read something like " ... you end up having make-up sex (always the best) ..." on the net !
Need Help from someone to explain me what "make up sex" means exactly

[Rider]

Basically its when you and your missus have a row/fall-out and then 'make-up' i.e reconcile by having sex!