Scooby, I agree with every word manda has just said. It's bloody hard just maintaining (never mind nurturing) a relationship as well as a baby. And I'm sure shift work must only make it harder.
TBH I expected it to be easier second time round and, in a way, at first, it was. But going back to work has really messed things up again. Life does seem like an endless round of childcare, shopping, cleaning, cooking, washing (oh god! The washing!), with work thrown in like some particularly evil garnish. Even with the best of intentions, DH and I spend a lot of time sniping at each other. We've recognised it as a problem though and are trying to find ways to spend a bit of time together without the DC. For instance, we both took Friday off, left the DC in nursery and went out for lunch at a country pub. We then got a babysitter for the evening and went to a black tie dinner. It was only our second evening out together in over a year. Pre-DD we managed to get out more because MIL happily had DS overnight fairly regularly but two of them is too much for her, at least until DD starts sleeping better.
So, I really do sympathise. Hard as it is, if you want your relationship to survive (and, obviously, that's a question only you can answer) I reckon the only thing to do is to find ways of spending a bit of quality time together. (Apologies for the yucky phrase "quality time" but I can't think how else to describe it.)
Don't give up hope on the walking, MissP. I was beginning to think my DD was also never going to do it. Then, on Saturday, she just stood up and walked. Just like that. And she's soooo pleased with herself. I was hoping that a tick against such a major developmental milestone would equal a good night's sleep but no. Instead, we have had several nights of her refusing to go to bed and then screaming like a dervish in the wee small hours when we try to persuade her to settle anywhere: her room, our room, living room, the shed. Some of it I can blame on teeth, especially the big hole that I assume a molar is soon to erupt through, but some of it appears to be general "cussedness". She is very strong-willed: knows exactly what she wants and how to get it. And is also adept at trying to get her big brother into trouble by screaming in an outraged manner suggesting that he has hurt her or taken something from her when, in fact, if anything, he is the victim.
Very glad to hear that Rosie seems to have the all-clear, sarah. Fingers crossed that Harry's asthma is not too severe and can be well-controlled by the inhalers.
Congratulations on completing the marathon, bluey. Am just in awe of anyone who can even contemplate doing such a thing. I think you must now need some fortifying cake so we should have another Starbucks date - with ang, too, if she's around.
"Chive child" made me 
, Shroomer. My DD thinks the garden is some kind of buffet. Not green matter, though; with her, it's soil and sand - huge handfuls that she stuffs in her mouth and eats with the kind of relish that I've only ever really felt for hangover breakfasts. Odd child. And it isn't as if she stints on eating real food 
.
Sure there was more but I really should get back to work now.