Young kids sleep patterns can change from August to May. The toddler may have been sound asleep in August and just started waking up early at day light savings. Just do the next 3 weeks without comment and say you’re not able to next school year.

Just do the next 3 Fridays and then tell her it won't fit into your schedule next year. Tell her well in advance so that she has ample time to make alternative arrangements.

Finish this year silently. Next year, say you are not able to do it.