"Can I just insert it one more centimeter?" "No more than this, or it'll count as incest..." The siblings who met due to their parents' remarriage soon became a couple. Although they knew that as siblings they shouldn't do lewd things— they would still steal kisses and embrace nakedly… Eventually, the two reached the point of almost inserting, and decided on the rule "if only the tip 3cm is inserted, it doesn't count as sex," continuing to engage in incomplete sexual acts. In reality, they want to insert all the way... The erotic situation of the siblings who are deeply interested in lewd things!
