Neutered Male Trying To Mount Newly Spayed Female

[Brek]

My male cat is about a year and a half and he was neutered when he was approximately 3 months. We recently adopted a female who is a year older than him, and she was spayed the day before we got her. I've kept them separate at first, but she was so calm and so was he that everything seemed great. Except he's been trying to mount her, and I don't understand why. They're both fixed. Is it possible that she was in heat when spayed and he is picking up on this?

Any help and insight would be greatly appreciated!

 

[abyeb]

Sometimes spay surgeries aren’t “complete”, but that’s rare, so I’m more inclined to think it’s a dominance thing. This thread: Neutered male trying to mate with spayed female gives some great insight for reasons for this behavior.

 

[Brek]

If it is a dominance thing, will he eventevent stop? I will break it up and separate them everytime. I make sure to give him more attention, but i do feel bad always putting her in a separate space