But she doesn't socialise them. It took me years for the female cat Ding Ding to be comfortable with me and when I stayed with my brother for 6 weeks plus she eventually wanted to sleep on my bed and spent the night lying on my legs purring.
Do not let the oppressed retreat in disgrace; may the poor and needy praise your name..
They do, we have lots of cats, we have cats come to the house all the time, you get the odd one that’s a right arsehole but otherwise they get one fine, they play together, they eat together, they are happy to share space. It’ll be fine and good on your brother for adopting and not buying a kitten.
Photo is of one litter we have in at the moment, Mama cat was sent to us with her four babies.