She will value your ability to be honest for years to come. I bet she will bring it up from time to time. And you will explain as you go. It sort of sounds like she is protecting you and does not want to see you unhappy - maybe she realizes the pain you had with your exh? She wants you to be safe.
Congratulations on dealing with "the talk!" That had to be tough! Sounds like she took it very well, though. So darn cute!
By the way, your pictures with your daughter are incredible. You make me want to go get some done of me and my little angel!