'tis OK daisy, you are PG after all. (Not just someone who kicked out their DH and took up with a married person and behaved like a spoilt child until said person left their home and DCs to move in with her, etc, I know this is irrelevant, and however close you are you never really know another persons circumstances, but she has become such a cow since all this happened, and very blatant and blshy with everything she does), also presumably your cat is staying at your house, not moving in to your friends conservatory to make the whole house smell and make their cat unwelcome in his own home?
I'm sorry, I should just embrace the "no" bit and deal with it, but I can't in case we ever (highly unlikey) ever get to go away and need someone to feed our evil rodents (which would stay in their cage in the garden and would need a visit once or twice a day - it was too much hassle moving them and their stuff last time).
But thanks for listening anyway both of you.