Hi there, just wanted to offer hugs and say we are in exactly the same situation, pretty much the same routine. I think she's just OT from her long week, and really there isn't much you can do. We have been having luck getting Finn to sleep until 6 with a slightly later bedtime, but it really depends on so much, like whether he's ill or not, whether he had a good nap at daycare, etc. etc. Sometimes we do an earlier bedtime and accept the earlier waking because he's getting a tad more night sleep.
One thing that did help us is to keep his routine the same on weekends. He catches up with a super long nap, usually 3 hrs and that worked better for us than trying to alternate him with 2 naps again. Have you tried to match her routine to see if she would adapt better with consistency?
Other than that, I can't add much :-( Hugs!!!