(F4M) "Milking" a Human Bull (Patreon)

You're being raised as human livestock for strong and healthy "seed", and today just happens to be the day you get milked. It's been over a week and your balls are swollen and wishing to burst at any given moment. Lets see if all that waiting is going to pay off. Let your mistress do all the work, all you have to do is give her the volume that she's looking for.