Congratulations on your new family additions. When we first brought our cat home, she ran directly behind the washing machine and climbed into a very small opening around the hose and stayed there for three days. After telling Dave on the third day that I was going to need a schnapps when she came out, she was named "Schnapps". We became very close when she finally emerged. She didn't have those same feelings for Dave until he made bacon and got down on the floor and shared with her. It changed everything between the two of them. Food/time are your best bet.
Trish