Can't decide whether to post long or short version - I've been awake since 3.20 and not sure if I've got the energy. Will try to be brief(ish) in the hope that I get some suggestions!
DS1 is nearly 3. From 6 months old until last November he was a perfect sleeper - 12 hours at night, every night unless there was something wrong with him.
We moved him from his cot bed into a new bedroom and standard single bed in November before the arrival of DS2. We had a few problems to start with but after a couple of weeks he wasn't too bad and generally went to sleep by himself and stayed asleep all night.
Over the months since DS2 arrived (he's nearly 5 months now), DS1 has got worse and I know that the way DH and I have been dealing with it probably isn't the best for all of us.
At bedtime now we try to follow the same routine of bath/shower, then a couple of stories before we try and leave the room. He is instantly out of his bed and opening his door (we have a stairgate across so he can't actually leave his room). We put him back and tell him it's time to sleep, stay in bed now and don't open the door etc. but inevitably within a minute or two he's out again.
Unless he's absolutely exhausted this can carry on for hours. When DH is at home (he works shifts so quite often it's just me), he gets increasingly cross with DS, making threats to take away favourite toys, DVDs etc. but then will eventually go in to DS's room and lie on the bed with him until he's asleep.
In the night DS often gets out of bed for no reason (2 or 3 times on average) and will not go back to sleep again unless somebody is there. I can get away with leaving him sometimes if I tell him I have to go and sort out DS2, but if DH is home then he normally ends up going in and sleeping with him.
I have been against DH sleeping in the same bed as DS ever since this started as I didn't want this dependency to start, but I'm going back to work after mat leave in 7 weeks and, what with already having to get up in the night to feed DS2 (who is a brilliant sleeper for his age) really don't want this to continue. I don't think it's good for DS as he is now only associating sleep with somebody being there, and it's not good for DH and I, who disagree about the approach to take with him which is causing frequent arguments as we both get fed up with it.
I could go on but want to try and get some ideas on how to start getting DS to stay in bed and go to sleep by himself. It was so much easier when he was in the cotbed and couldn't get out, but DS2 is in there now so we can't go back to that.
I'll give you more history if you want, but can anyone give any advice?
Hope that some other early birds are up and reading this - if not I'll repost a bit later.
TIA