Don't worry, if it makes you feel any better, I've got that child- DS was playing, got a bit excited I imagine, and bit one of the women at nursery. He followed it up by throwing a building block at her 
They took him to sit on the cushion, which is their mini time out, and there were tears and he said sorry.
I need to have words with DP, as this is what comes of laughing at DS' nibbly tendencies, as opposed to cracking down on them like me!
Otherwise he's generally fine, apart from the insisting on the same story being read to him four times in a row, or woe betide 
Urgh, half day working is a pita aethel. Doing a single half day in a week is fine, but like you say trying to do that permanently leads you to doing about a 60% day in 50% time. Still, at least you've got the flexibility. My DF and DStepM had an aupair when the kids were little (they are well off, but the cost wasn't that great, you just had to have a room available) which worked out really well.
I'm really sorry to hear you don't have the support you need in RL to talk about it seven, it places the burden of worry on you which is unfair. You clearly do a brilliant job in normalising, for your DS' benefit, what is an unimaginably tough situation. Whether you need to talk curtain colours, cupcakes or careplans we're always around to discuss!
Whilst not at all on the same level, I know what it's like ref the disability/serious illness angle given my Mum's situation, and as I'm her only family I know what a burden (to be frank) that has placed on me over the past ten years. Lack of RL support nearly finished me off, and it's why I've been so grateful for this thread whilst having DS.
Busy weekend, off to Bluewater for some Xmas shopping, and then seventy squillion trips to the dump to empty out the shed in preparation for a move that's never going to happen.
Then it's
time! Will make a curry and crack open a bottle 