C.B.
Hi M.,
I am also 31 and mom to almost 5 year old twin boys. Have you tried putting her down for a nap later in the morning - maybe around noon - and letting her take one longer nap in the middle of the day? My boys were taking only one nap per day at that point and that was easier for day care as well. Just my quick thought. Hope it works out. Let me know if you have more questions or need anything else.
Happy sleeping!
C.