Hi and welcome to the BW community! I think your LO is getting 45 minute naps because she is ready for more A time, but I'm not sure why you're having a hard time putting her down later... I'm checking with some of the other moderators to see if this is a spirited quality and how best to approach it. What happens when you do PUPD or pat/shh? Is she swaddled? What if you gradually added A time, by five or ten minutes for a few days and continued to increase is slowly?