What clean house?

OK all you working mommies; HOW DO YOU KEEP YOUR HOUSE CLEAN with a 3 year old running around and pregnant? I need advice because I leave my house at 8:30 am and return around 5:30ish pm and am DEAD Tired. At least my husband cooks so I do not need to do that but still. Sonia wants attention because she did not really see me all day and she definatly did not see Rich!!
Thanks