I have a male and female cat. Both have been fixed. The male is very dominate and attacks the female. She is very affectionalte when he is not around but when he is, she withdraws. How can I equal the relationship?

I had the same problem but mine was with my 6 year old male cat and my 5 month old female kitten. Constantly fighting, until I bought a plug in from my vet which releases cat hormones which are similar to the hormones released my cats from their face (when they rub their cheeks against corners/chairs etc this releases a hormone). Since having this they really calmed down and although they still fight it is nowhere near as aggressive as before. The dowside is the plug ins are quite expensive at £30, but it was worth it to see them now asleep on the bed together in harmony!!