In 1.10 Priscilla's arousal level is to low to strip at the start of the game. Same was for Lydia until I dosed her.That don't seems right to me because for me on a older version getting the phone number and then calling them several days to a week they normally went of a date with MC.
Can you get them alone?
If so you should be able to get them to strip for you just save before you ask and work your way down the list and soon you will have them where you want them.
NPC's will strip and have sex with you before they will allow you to kiss them.