My Sil has been dating a guy for around a year or so (not sure on the exact length). They don't live together. He has two children from a previous marriage. Dh has just received a message from his sister saying it's one of their birthdays so please sort out a card and gift for them, I'll send a list of things they like. Isn't this a bit cheeky, do people get gifts for the children of someone your sister is dating? We haven't even meet the children and dh has only met the his sisters boyfriend once. I'm really unsure if this is a thing?? AIBU to think she is being cheeky