Bouncing Up The Stairs (Patreon)

Jack's gorgeous girlfriend Fiona's incredibly sexy body had an interesting quirk. She was already quite busty, but when stimulated in certain ways, her big breasts would swell to a massive size. The swelling tended to go down within an hour or so, but releasing the excess milk inside could get the swelling down faster. Jack often volunteered to milk her whenever this occurred, much to his enjoyment. One day, Fiona's boobs bounced a little too vigorously as she briskly made her way up the stairs. As always, she was a bit embarrassed, even if Jack always enjoyed it when she swelled up. They both laughed together as Jack informed her that she had torn through yet another top.