Let mom know that if she works with you instead of doing the opposite, her daughter will enjoy her days much more (eventually) than ongoing stress of insecurity. Mom cannot make up for her daughter's unhappiness by over-attached parenting evenings and weekends. It also depends on child's natural disposition tho. I've got a newbie here too - comfortable within a week even tho mom at home can't stand to let him cry. Here caught on that I'm good to him, but don't cater. I've had plenty of newbs that don't get it. Good luck. Be patient with the little tyke.