Just that really.
He's always complained of a 'bad back' (doesn't stop him playing sports funny enough) which meant he has never done bath time. The girls are 6 & 8 with no SEN/extra needs.
I was over there and my sister was going out and so was I. We had a busy day and the kids needed a bath/shower before bed. My sister asked my BIL if he could get the kids ready for bed so he scuttled upstairs to ask if I could get them ready. I told him that I needed to shower myself and i didn't have time as we were getting packed up of which I got told 'cant you just take them in the shower with you'. Which is fine - I've done this before but it still takes time. I got them out, started to get ready and the girls were slightly hyper then he asked me where their PJs were kept (they've lived in the same house and had the same storage system).
Another time my sister was out and I was meeting her but had to pop in the house to pick up my jacket. It's 10:30 and the girls are messing around in their room fully dressed and no intention of going to bed. I ask him why the kids are still up and his reply was 'i told them to go to bed'. I told them to brush their teeth, put on their PJs and within 10mins they were snoozing their heads off.
The 8 year old lost her tooth and she ran to me first and placed the bloomin' thing in my hand. I sorted her out and my BIL came down from watching the football and asked her why she didn't come to him/why I didn't call him. To be honest I forgot he was even in the house as my sister had errands to do.
He obviously loves them to pieces but doesn't have a clue what to do with them. My sister says as he's older he's just from a different generation but it upsets her a lot which upsets me too. She's asked me if anything ever happens to them both for me to have them which I would in a heart beat. She's also asked if anything happens to her that id move closer as BIL wouldn't be able to look after them himself.
The final straw is that I've planned a city night away for her big birthday which his first question was 'who would look after the kids'.
I know it's not my problem but it upsets my sister so much that the girls don't really have a relationship with BIL and that she does all the childcare (he does do a lot of the cleaning and cooks often - makes sure they don't do without financially). But it also upsets me so much that I don't want to be around him.