@kmharr3, I can see that. My mom watched my baby for me for 4 months and had no trouble getting her to sleep. I'm actually the one that struggled getting her to sleep on her own lol but I breastfeed and she uses me as a pacifier so she wanted me to fall asleep on.
In my experience, they fight their sleep. When I watch kids over night they dont want to stay in their own bed and just cry. It makes it very hard for me to do naps and put them to sleep for the night when all they want to do is be held & cuddled. They arent used to falling/staying asleep independently. I can always tell who is co slept and who is not. @morganmommy79