Wayne, sorry I can't offer any advice on the spaying of the two. I would think it would help because if they are protecting their little ones, there won't be any little ones to protect and they might stop chasing Princess away. You might want to try calling your Vet. A lot of times they will answer questions over the phone with no charge, so it's worth a call.

I hope it works out because I hate the idea of Princess being chased away like you do, and thankfully she has been able to make it back home everytime, but there is no guarantee, and also like you, I'd rather see her re-homed if necessary so she doesn't need to fend for herself when chased off.

Poor Princess....