A command to the chronivac and Jenny's body started to morph a bit. Her dreaming in the warm sunlight allowing her calm breathing to let her chest puff out, and then withdraw. With each breathe her chest reached greater heights, and every exhale the breasts retreated even less further. The fabric of her dress and bra somewhat containing her growing breasts, but still being impacted as the bulge slowly grew rounder. While Jenny wouldn't notice her breasts were any bigger making her ignore any of the pain caused by a tight bra the fabric was constraining her chest quite a bit.
A second command, and the constraint caused by the bra was gone. Her large hardened nipples extremely obvious through the warped dress. Then with a third command the neckline of the dress slowly creeped downward. The window to her breasts were slowly deepening allowing the magnificent mammaries to bathe in the glow of the sun. There was something to be said about how beautiful and sexy Jenny was peacefully sleeping as her body had the soft glow of sunlight. However they were burning daylight and Jeff did want to have an actual date.
Jeff put a hand on her bare shoulder and said "Hey Jenny, we're here." Jenny opened her eyes and yawned a little. She quickly stretched her arms upwards a bit allowing her bigger breasts to bounce upwards and jiggle a little till they decided to stop.
Jenny said "Sorry I fell asleep on you." and then stared into Jeff's eyes. Jenny was perfectly aware that Jeff had the chronivac and was also aware that there was an unaware switch. If he did something to her she wouldn't find out by examining herself, but by looking into Jeff's eyes and seeing where they may be looking. The boy enjoyed staring at his work, although she didn't look too long. If he did do something he had all the time in the world to stare until he woke her up. Whether Jenny figured out what Jeff did was unknown to Jeff however as he took her arm and brought her into the museum.