I don't know how she did it.. but my daughter put herself back to sleep... I nodded back off despite…

I don't know how she did it.. but my daughter put herself back to sleep... I nodded back off despite my best efforts while she was talking away in the bassinet next to me. I woke back up and she had fallen back to sleep. I thought babies don't do that until much older.. she will be 5 months very soon.. i thought that happened closer to 8 months or so!😨