Tell her if she doesnt sleep with you, she'll end up one of the 72 virgins in the afterlife for some jihadist somehwhere.
It takes alot of patience. Weeks, often months of tactile behaviour. Maybe a game of tickling or toy fighting, leading to cuddles. Also, I cannot stress enough the importance of readily available sweets. You must have them about your person at all times.
Persistance is the key.