A lot of understanding Keir between us, both been running at a high-ish level since we were teenagers, met at uni in the cross country club, so we totally get it. Hubbie cycles about 100-125 miles per week but he cycles to and from work one way or both ways, he runs about 4 times per week 20-30 miles and swims once a week.
I run at 5.30-6am most mornings and then go out when he gets in. I run 50 miles a week when ticking over and 80+ when mara training. I also do core stuff for about 2 hours a week. If we both need to run one of us runs on the treadmill. He also travels a bit which scuppers me, but the main reason we bought the treadmill as well as this damn ice! We don't have a live in sitter. Ha!! I wish! I do some runs when wee girl at nursery and boys at school mainly on weds, but not had that luxury until now so was another early doors run and I do have to work the other days she is in nursery.
Boys have football on Sat am normally, so hubbie takes them there and takes wee lass too, so thats a good window for me! 
Luckily after his mad challenge last week he has had a week off which has made this weekend easier! The kids totally understand too as they have grown up with one of us out doing something, watching races etc, so its just part of their lives too. They love going to watch races, good thing I guess!
Totally pooped now after yet more sledging with the kids. Somehow a bottle of red opened itself. Must be the stress of cooking dinner and eating it with the kids!