Mother] [Adult Son] [Breast Expansion] [Human Test Subject] [Massive Breasts] [Heavy Breasts] [Degradation] [Clothes Don't Fit] [Tits Making Me Clumsy] [Taboo] [Incest] [Nipple Pinching] [Nipple Twisting] [Nipplegasm] [Tit Fucking] [Plapping] [Cum between tits] [Narrative] Summary: As her breasts continue to grow, so do her desires and taboo lusts. This private script is written by u/77Dogday