I'm currently 39 weeks pregnant and have literally just started maternity leave in the last few days. Whilst I was working DH & I shared childcare with DB & SIL as our boys are almost exactly the same age (only three weeks between them!). Usually this'd mean one parent having them 9-12:15, preschool until three, then another parent having them until 18:00, so that three of the four parents could work at any given time (we all work together).
It worked ok, but there were always niggles - nephew was always early here, late to be picked up, or when we went to collect the boys/DS to take them to preschool/home they wouldn't be ready. A few times when DS stayed at home because he was ill, they'd assume it was ok for nephew to stay here too so I'd end up looking after two three year olds for six hours, then have to go to work at three. Nothing too dreadful, but when it keeps happening it becomes an issue.
Throughout this pregnancy I've had SPD and the midwives have constantly urged me to rest which just hasn't been possible until now. Just having the one boy to look after has been so much easier for me, not to mention that DS's behaviour has dramatically improved since he has had me one on one for a few days.
DB & SIL are deeply unhappy with the situation however - apparently they think 'I'm letting the side down' and 'I've really messed them about'. In reply I'd like to tell them that I'm really hurt that neither one of them has once asked about my pregnancy or made the slightest concession towards me work or home-wise to acknowledge that I might find things more tricky when I'm a) preggers or b) after the baby's arrived...