DH's family Christmases are pretty large affairs - between 15 and 20 people generally, all of whom buy Christmas presents for each other. It works out being pretty expensive and time-consuming and the mound of presents under the Christmas tree is actually pretty obscene IMO.
DH has a brother and sister, both married and with young children (we also have two young children). Would it be unreasonable if I sent BiL and SiL an email suggesting that between us we just buy presents for each other's children (this is what me and my sister agreed between us a few years back)? DH doesn't mind either way but I get the impression that he doesn't want to be the one suggesting it. BiL and SiL are both very well off and so they wouldn't mind the expense of buying for everyone, but for us we could really do with not spending so much at Christmas.
Should add so as not to drip-feed that I don't get on very well with SiL...