FERA-125 Giri-giri sex with mom, only the tip can enter

Aiko desperately resisted her son who sought her body, trying to persuade him not to enter the forbidden world. However, her son did not listen and forcefully pressed on. Unable to resist her grown son's strength, Aiko reluctantly agreed to 'just the tip doesn't count as sex' and decided to accept him. The two became engrossed in a play connected only by the glans, right at the edge of the forbidden world. But before her son, Aiko found herself unable to be satisfied with just the tip...