Bridesmaid Gifts

So I've been thinking a lot about what to get my girls without spending a fortune. Wanted to make it personal for each of them. This is what I have so far...

I got each of them a personalized necklace with their children's initials on it, but wanted to a little something else more specific to their interests.

For the fitness lover and coffee drinker: a wellness journal and coffee cup that says Gym Hair Dont Care

For the teacher and coffee lover: a really cute lesson planner for the upcoming school year and a coffee cup that says Coffee Before Talkie

For my sister-in-law who just had her second baby (who was her rainbow baby), I was thinking of a photo book with all of the pictures (professional and not) from when he was born

I'm stuck though on what to do for my other sister-in-law. Shes a makeup lover and she's pregnant with her second child and did mention that she would love maternity photos done by my photographer, but I dont really have $100 to spend towards that and dont want to do more for one BM over the others. I thought maybe I could put $50 towards it, but i dont want to just hand her some money. That just seems impersonal. Any suggestions on possible gift ideas or ways to gift her with half the cost of photos without it seeming impersonal?