My Molly was spayed yesterday and thankfully I survived

I was a nervous wreck! She on the other hand is doing fabulous! Just a quick question...How calm and quiet do I need to keep her? It was very difficult to keep Jax away from her last night but today she seems to be her old playful self so I have been letting them play. I know she feels good but I don't want her to overdue it. Should I separate them or just let them go if she feels like it? She also had 8 baby teeth removed but she is eating already. She actually ate a bit last night but I was scared to let her eat too much and throw up. I am so thankful she came out of the surgery ok. Gaah, you would think they were made of crystal the way I treat them

but they really are tough lil' guys!
Another silly question....since Molly has come home, Jax has been....sorry..humping her like crazy! He never used to do this. Do you think he 'smells' something on her that he didn't before? I don't know....weird. He never used to do that to her, only his bed