I have one sibling, my DB who is married to an older women (only including that incase it has some relevance? He's 31, she's 45 so yes, not massive!) we always used to exchange gifts at Christmas/birthday and I would spend £20-30 per person, the same as we spend on DBIL etc. last year she informed us (via my DM) that we will not be doing birthday presents any more and have a £10 limit per person at Christmas!!! TBH I felt a little sad by this. If it was a money issue then I would understand but they she is minted!! They have 3 brand new cars, horses, million pound house etc etc and I know they are not in money difficulty as she plans to take early retirement. They spend a fortune on her kids and her grandson.
This year we stuck to the rules and spent £10 person (DB, DSIL and her 20yo daughter) I was really impressed with what I had managed to buy with £10 
In return we got a cheap (and I mean cheap) bottle of wine between the 2 of us and my new baby got a pair of booties.
I just feel slightly gutted that the Christmas birthday spirit has been lost between me and my DB because of my SIL. 
I know I'm being mad, it just saddens me after spending Christmas at my IL where all the siblings and step siblings buy nice presents and make an effort
Do the present buying rules change now that we have a child?? (Even though I have always bought her daughter one?)