I think you are just thinking too much. your baby cries for a reason and she's too young to recognise ppl. Babies start to reject strangers after 6 months like that. your baby has been spending time with your CL and she didn't fuss when your mom takes care of her right? My boy cries too in the middle of the night when my hubby changes his diaper because he's hungry. Maybe you might want to feed her first then change her diaper. Try to gently rock your baby, make shushing sounds, let baby lie on your chest, pat her back... Btw, are you giving your baby FM or breast milk? I am on TBF and it helps me to bond with my son.