Welcome to PetTalk LOT - hope you'll stay around and join in.

Can I just be really boring and back up the good advice from other PT'ers?

Momo is a beautiful BABY - think of her as just that and you won't go far wrong. She left her Mummy and siblings much too young and you're having to be 'Meowmie' and sister to her - teach her very gently and she'll reward you with years of loving.
As for squirting water - all of my three look to where the water came from and aren't really bothered at all!!
Clapping hands and a firm 'No' works wonders.
She's carrying the stuffed toy around because she's lonely and perhaps a little scared - new house, new people - very confusing.
By the way - her pics., are adorable and who would think a tiny kitten could have such a HUGE mouth -(the pic. in the bath) - LOL!!
We all look forward to watching this gorgeous new member of the Pet Talk family grow into a beautiful adult. Thanks for sharing with us.

Lynne