I messed up and introduced a new female 7 yr old cat to my male 8 yr old cat.. They were doing fairly well, a few hisses but tolerating each other for the first few days, then my husband was sitting on the chair and the new female jumped up into his lap, and our male came into the room. He is very attached to my husband, often not leaving his side when he is in bed on days when he is not well.. After seeing the female with my husband my male cat aggressively tried to attack the female.
I have them separated now. but I am afraid of what will happen to the little female, if we were to leave them alone and accessible to each other..
Can I re-introduce them very slowly and maybe have this work?