tholeon. I have had similar issues, however my DH was a SAHD (His choice not mine) and for that reason we agreed he needed some interests and "Him time" - this equated to training two footie teams 4 x per week and a military history club.
When I became pregnant with DS, (DC #2), and working full time, I was exhausted and it created rows as I also wanted me time. I was working F/T, coming home taking over from him immediately, doing all the night time stuff, pregnant, housework (he did none) and being the sole parent at the weekend.
I made him go back to work last year. He still keeps up his outside home activities and we have constant rows about it. I can't even find time to go to 1 Zumba class per week. I am still working full time.
I seriously think a lot of men put themselves above their families and wives happiness.
It is/has created real resentment in our relationship, that I am trying to work through.
sorry - that was a me me me post. My advice to you would be to try and talk it through with him and tell him that you are a partnership at all levels, you support him to be a high flier, by being the SAHM, however he needs to be a part of his children's lives and your life. Otherwise you will end up very bitter and that is the path to ruin. He needs to support you. His role didn't end the day he knocked you up!
hope it all goes well for you