BACKGROUND: I'm single mum, 1 DS, work FT and doing OU degree. Sister had DP, both work FT, she also does a lot of evening clubs etc.
So we go for family meal, Mum, Dad, Sis, her DP. Myself and DS. Everyone chatting nicely, Sister telling us about job shes applied for internally. Mum askes if its more what she'd want to do, Sis says yes and Mum says maybe you could do a degree?
Sister says, far too loudly IMO, 'It's not that easy, some of us won't get it paid for us'. With a glare in my direction.
Mum says she would be willing to help out but you could have cut the atmosphere with a knife.
Please be proud of me for biting my tongue. 
AIBU to wonder why someone would do this??