Hi, new to mumsnet so sorry if this is the wrong place to put this thread but need a bit of advice. Sis and BIL been married 5 years and have 4 month old ds. Since he has been born get sis on phone to me slagging off BIL for going out in evenings, not doing nappies 'right', not drying him properly after bath etc. Then we had them over for weekend recently, really nice weekend and chance for me to see that BIL is in fact great with dn. He gets up with him first thing and feeds him, changes him and plays with him while sis gets lie in (sis admits he does this every day!! Before he goes to work and for longer at weekend!!) He works late sometimes but still baths dn but then leaves drying etc to sis as he goes to cook the tea! Had really nice weekend but got awkward as had sis slagging BIL off to me and BIL slagging sis off to dh. Felt uncomfortable with this as they occasionally did this in front of both of us and dh and I felt like we were put on spot to take sides. Trouble is that dh told me BIL has confided that he is getting really fed up with nagging and is not happy with relationship at minute. I know I've only seen a snapshot of their relationship and that things may be different the rest of the time but do feel that sis could give BIL a bit of a break. Do I just keep my nose out or do I try to talk to sister about this?