My girlfriend's mom is my sex slave. (Saotome Arisa, WPE-32)

I never imagined that my girlfriend's mother and I would end up in this kind of lewd relationship. After cheating on her once, we couldn't help but have sex with each other every day. After licking all her nipples, we would have a secret sex education session in the bathroom. It was so incredibly pleasurable, from morning till night!