The prerequisite for Alice being a good mother is her having LOTS of therapy and a healthy partner. If she has both of those things she's capable of being a good mom.

Canonically her only biological child is a girl she only held one time and named Aster and only saw once more in her entire life. In AU's where Alice ends up having children at any point she spoils her girls. She's very supportive and encouraging and really loves doing all of the stereotypical girly-girl things. Shopping, manis and pedis, hair salons. I haven't really given Alice having a boy much thought. I think she'd struggle a little to connect with a boy but she'd work to cultivate his interests, probably put him in sports.

Alice is a very flawed woman but she has a lot of love in her heart. In a healthy environment she would be a supportive but slightly overbearing mom. The kind that wants to take "just one more picture" for dances, always showing up for every game, show, or any activity her children are in, and always gives slightly too long hugs that have her kids groaning and getting embarrassed.