My sister-in-law trained my penis to last less than 5 minutes due to premature ejaculation for a week. Kawakami Nanami lived a special training life of intense ejaculation every day. DVAJ-438

I was worried that I ejaculated too early and wouldn't be able to satisfy my wife, so my sister-in-law, Nanami, saw me training my penis with a vibrator. After I explained the situation, Nanami said she would help me overcome premature ejaculation. From then on, I started training my penis with Nanami's masturbation while avoiding my wife's eyes. Nanami trained so hard that her kissing, oral sex, and other behaviors kept escalating... Eventually, she even promised that if she could endure it for 15 minutes, she would let him penetrate her vagina. Can she endure it and have it penetrate her vagina? But if we do it together, that would be cheating... Ahh~ I want to put my penis into my stepsister's vagina and let all the semen flow out!!