Natsu, a married woman living with her daughter and son-in-law, is desperately trying to meet her contract quota by using both herself and allowing creampies. As she has one more item left to complete this month, she sets her sights on her son-in-law as her target. Even though he's technically her daughter's husband... ever since Natsu seduced him into having unprotected sex, they can't seem to get enough of each other. Their bodies remember every touch, and they find themselves unable to resist their intense relationship.