Jack was sitting down eating pizza and talking with Mary, thinking of her as his girlfriend felt odd to him after so long when he felt an intense tingling in his crotch.
"What the he'll is this, groaned Jack as his loose pants begsn to feel tighter on his expanding junk. Jack looked down at his crotch to see a bulge beginning to expand. As the bulge expanded he realized that if he didn't act soon it was going to get painful when he ran out of room. Jack made a decision in the moment and stood up quickly undoing his belt and dropped his pants to see his boxer breifs looking more like someone shoved a pair or lemons and a sausage in when he wasnt looking.
Mary watched the expansion in delight and wondered what it felt like. Jack watched as his dick grew inside his underwear so much it pushed the elastic band away from his body, giving him a good view of his flaccid member. The sight of his growth was turning him on and as he got hard, Jack had no choice but to drop his underwear as well. Soon the growth stopped and Jack was left standing with an 18" long 4" thick member with what looked like a pair of oranges hanging below.
"Well you turned out great," Mary commented with a look of lust in her eyes.
Jack looked up at Mary in disbelief, "you did this? But how?"
"With these," Mary indicated the case in the table, and Mary recounted to Jack her experience with the vials and that she wanted to give him something special.
"Well, now what," Jack asked.