Jen should have known that trying to reverse a curse placed on you was not going to work.
Jen returned to being a milk machine and Vince once again had the option to transform or dare someone.
Now Vince's overly large breasts were exceedingly sensitive and as he walk along his t-shirt stretched to the max showing his belly and the lower part of his breasts rubbed against his nipples. This caused his diminutive penis to become hard and start to show a stain at his crotch.
There were things Jen never new about Vince. Things he often didn't even admit to himself. But his over stimulation of his milk filled breasts and the bovine hormones made his once older body seem to rejuvenate becoming somehow quite young. He felt like he did when he was a teenager.
He enjoyed the new him and knew that he would have to continue the hormones to retain this youthful appearance. But he also knew that if he didn't have someone milk him soon his tits would grow even more. That was going to be a constant chore. He just wasn't sure if his milk would have any affect on anyone who drank it.