My DiL wanted pets, cats in particular, I suggested it might not be a good idea as she has a debilitating illness and two young daughters, my son is a full time carer for my DiL and has a lot to do with day to day for care for my DGD's, housework, driving, gardening, DiY etc.
I suggested they wait until DGD's were older and more independent as my son would have to also look after the cats (kittens) on top of everything else.
My tuppence spent I left to them to work out.
I was introduced to two gorgeous kittens, one male, one female and formed a bond, a few weeks later DDiL found another kitten she wanted to have, I suggested that two might be a good number to stop at and again left it at that. Yes you guessed it in comes kitten #3. Of the original two the queen favoured my son, the tom favoured me, the third tom favoured my DDiL, all three kittens soon learned to avoid my youngest DGD and tolerate the ministrations of her older sister.
Longer story short, eighteen or so months later, the queen still favours my son, the tom favours me and the youngest tom has left home about 4-5 months ago.
My DDiL takes it all in good heart as she gets smooches as and when they ( the cats) choose. [grins]