[Starmine18 (HANABi)] Ara-ara Mama to Seikou 1.5

A curvy stay-at-home mom turns 'training' with young Misaki into her own private workout, insisting she did plenty of homework to keep him comfortable before pinning him beneath her sweat-soaked body and riding him with shameless, breathless enthusiasm. Cutaway views trace every inch as she takes him impossibly deep, her composure crumbling until she gasps that she can no longer live without this kid, all while her husband remains none the wiser. The post-workout cooldown arrives with a cheerful 'I'm back' at the door, and Mom smoothly blames the smell on a famous exercise video while the thoroughly spent boy lies dazed on the floor behind her.