[Kawamori Misaki] Megumi-san wa Musuko no Kanojo Ch. 14

Konomi, the older sister, is caught off guard when her younger sibling declares it's wrong, sparking a frantic "major bust alert" as she struggles to contain her desire in a "lost battle." The tension escalates as she becomes addicted to the womb orgasm, culminating in a heated threesome where she can't help herself and a new participant, Oji-san, joins, turning the intimate scene into a crowded, shared experience that leaves everyone breathless and questioning the limits of their relationships.