Gift for finances ex wife/stepsons bio mom

I’m on the fence about getting my stepsons bio mom a small gift for Christmas as sort of a bridge or peace offering lol, and leaning more towards doing it.

A little backstory: To say she’s a high conflict bio mom would be an understatement. We now usually deal with her husband and since we haven’t been seeing her as much during exchanges, it’s been going a little better.

She has ALWAYS disliked me. I’ve known my fiancé since we were 16 before they even met, and her disdain lasted they’re whole 6.5 year marriage which turned into the basically hatred when my fiancé and I started dating.

But I’ve decided to practice what I preach to my fiancé and be the bigger person.

Except I have no idea what to get her. Something with the kids on it? Like something from Shutterfly?? I really have NO clue, but would like it keep it under $20.

Does anyone have any suggestions??