So... I'm a part time teacher, DS is 2.5 years old and I'm 35 weeks pregnant with baby number 2. Every Friday I get together with my mum and we have a lovely day out / play date with my DS and my nephew. My brother and SIL both work full time and it's great that I get to spend time with my nephew. Anyway, my SIL is a teacher and on 6 week holidays - I have been expecting a text / phone call asking if she can look after my DS for the day to help me ( as I'm the size of a house) out but this hasn't happened? I'm starting to find it a bit rude and infuriating! AIBU? Would you say something?