How do I politely avoid a school mum who bullied me in high school?

My daughter has just started school and she's made very good friends with a little boy called Connor. Connor is her little play ground boyfriend 🤣 and they think they are married and play mummys and daddy's together at lunch time.

I've only heard about Connor from my husband as he usually picks up from school as im still at work.

I've managed to get a couple shifts moved around now so I can pick her up instead after school. She came out holding hands with little Connor and said "mummy look mummy this is Connor my husband " 🤣 all very cute until Connors mum comes fowards and I recognise the face instantly.

Its Abbey 😒 from high school. Abbey was a massive bitch in school and was a real mean girl and would constantly bully me and my best friend and even stole my glasses and broke them.

I mean I was a little happy to see shed gotten fat 🤣 but when she saw me, she acted like everything was fine and as if I was an old friend. She keeps saying are kids should have a playdate soon and keeps inviting me out with all her snooty mum friends.

I know she only wants to know me now she knows my husband is rich and knowing her old reputation i wouldn't put it past her trying to make a pass at him 🤣. But she must have took one look at my car and thought "ohh I could do with being her friend now". I try and stay polite as I dont want to set a bad example to my daughter and get all the other mums talking.

I understand people change and were not in school now but she still very much is in her head. She bitches to me about all the other mums and there children as if im gonna join in with her and i just can't stand who she is as a person. She's sent me a fb friend request and invited me to a mums WhatsApp group.

Im just thinking "oh god how do i get myself out of this one"

I don't trust her around my husband either everyone knows she's the local bike and had more affairs then id like to think about. I trust my husband 100% not to do anything.
Updates
2 h
she's always saying stuff like "weres daddy today?" And talking very flirty to my husband and about him. I've even seen her trying touching his upper arms and I was almost about ready to throw hands 🤣. My husband is polite back and just says she's friendly
How do I politely avoid a school mum who bullied me in high school?
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