One of my SILs got pregnant shortly before DD was born. As DD started growing out of things, we lent them to BIL and SIL for their baby (they live 300 miles away, as do the rest of that side of the family). We thought they'd use the stuff and then return it, but then another SIL got pregnant and the stuff got passed on with no mention to us to them. Then the first SIL got pregnant again, so they got passed back, and then the other one so they went back again. Then the last brother's girlfriend got pregnant so it all got passed on to them - again with no mention to us. So rather than being used for 1 more baby and returned they were used for 5 more in 2 years. We did ask for them back, but they were constantly in use. When we did eventually get things back, they hadn't been cleaned and some things had torn/ripped, which meant that I had to spend quite a long time fixing them before they got put away.
Got a text from SIL 1 last night asking if we still have some of the things. Yep, she's pregnant again. I'm sick of subsidising a family that only ever take from us. WIBU to tell them to fuck off and stick them on ebay?