I'm starting to get quite annoyed with a relative (DHs sibling) and I'm not sure if I'm being a bit mean or they are being a CF.
Every time I receive a message from said relative it's always a very insincere "how are you" followed with some sort of request to have or "borrow" never get back something, usually baby items/clothing that dc have grown out of. Never any back and forth conversation unless it's about the item/s they have requested. Every single time after the request has been granted and arranged, if I continue the friendly chat with another message they don't reply to me. Until a few weeks later when they want something again.
I mentioned to DH that I felt like a cow but it feels like they genuinely don't care and when I looked back at my messages they never send one without a requesting something for free in it!
DH is a little on the fence and said "it is rude yes, but I wouldn't make a fuss about it". 
I'm sick of feeling used and am quite insulted by their behaviour so am firmly in the "fuck it" camp. I don't want to make a fuss but I don't want to reply anymore. If he chooses to entertain their cheeky requests then so be it.
AIBU?