SIL has 2 DC, both older than our DS. For each of her Dc's birthdays and Xmas we buy lovely gifts and make sure that they arrive on time.
SIL and I do not get on well - we tolerate each other mainly for my mum's sake. but DCs get along well.
It was DS's 3rd birthday last week - they can not forget as it is that same day as SIL's other nephew (her sister's DC). We waited eagerly - no card/present arrived. After a little reminder via my mum - a text appeared from brother - they "forgot to post his card" and they will send his present with his Christmas present.
AIBU to expect them to try to get his present to him on time. He may only be 3 but I would like his birthday to be separate from Christmas?