I'm thinking of my fiance and I being manipulated into giving up our cat
Is there a certain reason behind this?
The cat only really likes my fiance.
It is wrong to be manipulated into giving up something you love. People should be honest in their dealings over property.
I just can't stand the cat's meow.
If you can't stand the cat, tell your fiance about it and just don't manipulate them. If they love you and want to stay with you, then it will be their choice to get rid of the cat or not. If not, try to just love the cat yourself as I think they're not that bad.