I woke up once to my straight-laced wife masturbating next to me. She was panting and her pussy was making these wonderfully gooey smacking sounds. I rolled over and asked her, "are you playing with yourself?" to which she replied, "you won't tell anyone, will you?" which revealed an erotic fantasy of hers. I finished her off with my mouth, and after that she would freely play with herself whenever I took her doggy-style. She knows I love her licking her fingers when she does this and letting me taste her goo from her tongue and lips.