AIBU to be fed up

[teabagtea]

to be fed up with hearing from my MIL about how poor my SIL is when she chose to give up work after having her first and has never bothered to go back?

Bit tricky. Say, well maybe the new year will bring a new job...

does she want a job, has she tried looking with no success? if she's chosen to remain off with the wee one (and I'd be tempted due to the cost of childcare) then no but if its circumstances that she wants to change and can't then kind of