It is recommended for the wife to sleep with her husband touching his body, and for the husband to be kind and gentle with his wife always specially when they are sleeping together . The side which is usually recommended for every one to sleep on is the right side of the body but for husband and wife sleeping together, they should sleep is the way which suits both of them. Husband should not give his back to his wife, nor wife should give her back to her husband.
Wassalam.