Living With My Sister Who Will Let Me Insert Up To 3cm Of The Tip Of The Penis.

I saw my twin sister Itsuka masturbating with a VR headset, and on a whim, I begged her to let me touch her breasts. 'We're siblings! That's impossible... but, just a little bit...' Unable to suppress her curiosity about sex, the two of us eventually got to the brink of insertion. We made a rule: 'As long as only the tip goes in 3cm, it doesn't count as having sex,' and started repeating tip-only sex. However, even just putting the tip of my dick in and out of her pussy felt incredibly good, and gradually I wanted to go deeper... The twin siblings' life of tip-hammering sex on the verge of going all the way!