Exhausted

Lately M has had a super hard time getting up from her naps. We thought she might be done with naps (she's 3). We've started letting her read quietly in bed while sissie naps but she's fallen asleep almost every time and then can't seem to wake up for hours. Any tips...anyone else go through this? All evening she seems really tired and even asks to go to bed sometimes. But then she wakes up before 6am every morning! What to do?!

Here she is "after" nap time...a time when daddy was trying to wake her up but fell asleep himself instead:)