It can still be about the sex
That’s what sleepovers (at other people’s houses lol) and babysitters are for! Oh and daytime!!
We like to be in each other’s company which is good because we spend every day together 
But dh craves time alone, he gets this at night as he has wierd insomnia and always has had, he finds it practically impossible to fall asleep before about 3 or 4am but will rarely wake on his own.
I think time alone is important as a family but there is plenty you can do together.
As a family, two adults, 4 year old and 2 year old we like playing games. We have a few board games, pop up pirate and that sort of thing, Buckaroo is still fun as an adult on occasion (to be fair dh’s MS makes it ‘interesting’). In the evening downfall, scrabble, etc.
What about garden games? Quoits, jenga, skittle or boules (is that how it’s spelled?) all fun and you could get a bbq on while having a go 
What about sharing a book and snuggling up and reading to each other? Dh read to me as we were driving to Wales and I loved it, definately do that again.
I like playing the xbox 360 kinect games, even Alice has started to enjoy them. Saule hasn’t got a clue and he gets really excited and runs around.
I like making things mainly crocheting and sewing and dh loves painting and playing on the xbox so we spend time doing our own thing to.
We both love films and stand up comedy dvds which are good to share with and without the pixies. Do popcorn, re-arrange the furniture and get the fire on (and try not to fall asleep
)
Book a date night and pick something out of the hat, cinema, living room picnic (for adults of course), read to each other - short stories or poems maybe, rediscovering a record collection or music you used to listen to, I am sure you could think of some more 
I think it is important to make the effort to spend time together and alone and also learning and discovering. Enjoy 
sarie