I know lots of female pairings get on fine, but mine never have really been perfect.
I have a mum and daughter (used to be 2 daughters but I had to take Strawberrry out the group as they beat her up)
Mum and daughter have been together for three years and are generally fine together (not loved up like my male/femle pairs), but mum is horrendous if any other buns are around and can be quite nasty to her daughter.
I'm sticking to MF pairs always in future!