You might think about trying to find new homes or the kittens, we know you love them, but at this age, it's pretty common for mom to want them gone! In nature, it would be time for them to fend for themselves. One family I know ended up with basically detente in their home. They kept two of the kittens, and Momma stayed upstairs, the kittens downstairs, and when the mom cat wanted to eat, she'd find a human and demand they accompany her downstairs into what she then perceived as "enemy territory!"

Best wishes on your engagement! If the animals approve of him, he must be okay! And of course, congrats on your new addition, Bashful is beautiful!