Hello, everyone. I'm really sorry I'm not keeping up very well with everyone.
It's been quite a good week here. Some mum-friends have had new babies recently, and I've had a good physio appointment; physio seemed pleased that I had been doing harder versions of some of my core exercises, and gave me harder versions of them all, and more reps. My core muscles are still weak, and I can't walk for more than about 20 mins without really feeling it, but at least I can feel them now. I know where they are! 
Re: sex, if it makes you all feel better, I haven't had a chance to try, as DH is apparently not interested
. He needs to go to the gym and get his heart racing again, I think. He was making rather mournful comments about my positive physio appointment this week, saying "And you can say you are much fitter than your husband". Oh, dear.
jigglebum, your DH will step up a bit for the 3yo when the baby arrives; I think that does happen even with men who aren't very interested in babies - the contrast with the "more interesting" child suddenly becomes apparent! Thankfully for the older children...
I have some friends whom I saw recently, and this transformation had happened in the bloke, who I always thought was very un-paternal. It was extraordinary. He doesn't seem very interested in the baby, but there is hope for him now! 