I just need to vent about this: at the start of the summer holidays DH and I were planning to take two weeks holiday but to stagger them so that we had 1 week together but covered 3 weeks of the childcare. My mother said that we should take the two weeks together and that she would help us out with the kids so that we could.
She helped us out for three days the first week they had off, we cobbled through the second week and are just back from two weeks camping together. I asked my mum if she could help us out this week and she was a bit vague, so I rang again because I was running out of time to book them into holiday club if not. She finally told me that she can't look after both my boys at the same time anymore as DS2 is quiet and lovely but DS1 is too difficult. 
They are 5 and 7 and they are bloody hard work but this really saddens me as it feels like there's more to it. I've suspected for about a year that she has problems with my DS1 and I mentioned it to my DH a long time ago but he thought I was probably reading too much into it. But I've noticed when speaking to her that DS2 can't do a thing wrong and DS1 can't do a thing right; I don't think she's had anything positive to say about him in a very long time.
Plus now I can't get them into holiday club this week so I feel royally screwed over. This whole situation has made me feel really awful, but there's no point talking to her about it as she'd probably just go really odd and cut me out. (We previously had 8 years of no contact because she went in strop over something (I still don't know what).
I don't even know what anyone can say, I just needed to get this out.