DS is 11 months old. Since he was born, he has never slept for longer than 4 hours at a time (apart from 1 stint of 5 hours a few months ago!). Mostly he wakes every 3 hours. As he's breastfed, I'm awake with him every time. I also co-sleep with him, as it's the only way he'll stay asleep for longer than an hour, but he can be quite restless, meaning I'm awake even if he's not. DH generally gets up with him at weekends, since I'm up every day during the week.
I'm exhausted, having averaged about 6 hours' sleep every night for almost a year. DH gets full night's sleep every night. I also have depression and suffer panic attacks, which gets worse if I don't get enough sleep (pre-DS I averaged about 10 hours' sleep each night, which my body seemed to need)
DH is about to have 4 weeks off work. He said how much he's looking forward to getting lots of lie-ins. I asked what he meant and he said he thinks it's only fair for us to alternate getting up with DS, so he gets up early one day, and I get up early the next. I feel this is a bit unfair, as his lie-in after a full night's sleep is a luxury, whereas mine is more of a necessity for catching up on sleep. Mine is also often interrupted by DS needing to be fed, so I sometimes only get an extra hour anyway.
I'd like to ask DH whether he would mind if I got an extra lie-in every few days, but I'm not sure whether that's reasonable, or just me being lazy. DH is someone who is very "fair" about splitting responsibility, but by that he means it all has to be split equally, whereas I think it can depend on circumstances.