DH has one sister who lives abroad with her husband and their three children. I have never met any of them but made a real effort to be long-distance friends with SIL up until a lot of small incidents ended up with her being extremely nasty and me calling her on it. Since then I've given up and she and her husband have bad-mouthed me to DH and his family. Lovely.
So, since DH and I have been married I've been sending birthday and Christmas presents every year for SIL, BIL and the DNs. These have never been acknowledged until I've asked about them before putting 'lost in post' forms in to Royal Mail. Given the past behaviour towards me, I feel like I can't really be bothered carrying on sorting this out. The DNs' birthdays are coming up. If I leave it to DH to do then they will get nothing. I'm inclined to just send cards.
Any objective ideas?