The natural choice for her was to give her sister and mother big tits as well. Her sister Mari would have boobs of a similar size to her, while her mother, Nadeshiko, would have tits that almost covered her whole torso, making her more tit than woman. Jayann also made it so that the two of them would naturally have sex with her without them really considering it as sex.
With those changes made, Jayann bounced (quite literally) downstairs to see what they looked like. Mari was sitting by the kitchen room table, scrolling through her phone. She was wearing a low cut halter top that showed most of her cleavage and a short skirt that only half covered her panties; it seems she was the more sexual of the two, at least openly. Her mother, meanwhile, was cooking in the kitchen. She only wore an apron, which only covered a third of her gigantic tits and left her ass softly jiggling in the open.