Marynary "It seems to me that the OP is only frustrated by her DP because she can't retire too as she has children and hasn't built up a decent pension. That isn't her partners fault."
that's exactly how I read it.
I see someone else has mentioned large mortgage so maybe it wasn't my imagination - I don't want to keep scrolling back as I am still having some issues with MN and getting logged out.
Wanker - interesting point you made with this - "So are we really saying here then that the OPs DH should get a job so that he can support her adult children then allowing the OP to retire early?"
I would never say that - I totally respect that the OP might want to help her kids out but it wouldn't seem right at all to ask her DH to be involved in that.
hopefully OP will come back and say if her DH could support himself independently because that's so important, as well as any agreement they may have made about marital income.
in the face of a massive mortgage, other bills can be quite small, relatively speaking.
sorry OP, you wanted a gentle moan and we want details 
seriously though, in another place you mention about maybe just being pissed off at the thought of 20 years of work. That would piss me off too but I don't have kids so early retirement is an option that I work towards. Lots of people do know how you feel. I met a lady the other day who retired at 60 and had a countdown on her wall for 12 years. What I do wonder is, if your DP is enjoying being retired then would it help if he had work but wasn't happy with it?
I admit I am biased because I could pack it in tomorrow and I am lot younger than your DP. I don't know where the time goes tbh!