Having toddlers--or any aged kids for that matter--is exhausting for both parents and at the end of the day there isn't a ton of energy left for Nookie time. But we still make the effort. Here is a list that you may want to consider if you are wondering if you are way to tired to roll in the hay.
You actually want the kids to wake up during foreplay.
Your partner doesn't realize that for the past 7-minutes he has been groping your ribs instead.
You wish there was a TiVo to FF to the end.
You actually spend loads of time flossing in hopes s/he will be asleep when you are done.
You consider sneaking to the car and drinking the rest of the day-old coffee in your travel mug.
You mistake his ZZZZZZ's for purrs of pleasure.
You count thrusts instead of sheep.
You lie and say you are ovulating or on your period, whichever is scarier to them.
You both (fake) orgasm together.