You are Zack, Jane little half-brother. The two of you are a bit distant but like each other. The two aren't related through some remarriage and the passing of your mother. You ended up needing to stay over with Jane a few times now, you even have a key for her house.
You walk in and send her an SMS:" Dad is renovating, again, and my bed is under the sawdust, again, I'm came over and I'm cooking some food". You come in, take off your shoe's and see a bra on the chair. you take it and are going to Janes room but something new on the wall. You guess it's a weird thermos and turn it a bit up as it is a bit chilly.
Jack enters Janes room. Just before he puts the bra loosely in the wardrobe he second guesses and takes off his hoody and puts on the bra, with a chuckle.
The chuckle quickly ends as he quickly fills the bra. You almost tumble over, but readjust yourself to your new centre of mass. slowly move your ginger to poke the engorgement.
It is definitely real.
You go step for step through your head what could have caused it since you entered the house and determine it is the weird thermostat. You go back to take a better look and find it saying:"milk prod", which you are pretty sure is unusual for a thermostat, out of morbid curiosity, turn the dial as much as you can..., it keeps going for a bit, while you are turning you feel do feel a weird 'filling' in your breasts after you get bored turning it, you feel it keeping going and going.
After few minutes your breast start perking up a lot and a bit later they start aching. Still curious, you undress and get into bathroom you inspect yourself, you sure look weird with these breasts on your alright build. As you prepare to attempt milking you get an idea. You exit the bathroom and go to the paper bin and find two used kitchen roles and put them on your dick and sure enough, your cock snugly between your breasts, which now really started to hurt. you go to the thermostat and look if there is a cool option: cum production. You again turn the dial too much and go to the bathroom.
You look at the time, you got enough time before Jane comes home just be sure you lock the bathroom and let the shower run steaming the bathroom up making it nice and warm, you sit down feeling your balls fill up an.
now that both your breasts and your balls are aching for realise, you attempt tittyfuck yourself, but before even squeeze your breasts around your dick, your breasts spew out milk. you moan out off euphoria. In attempt to still tittyfuck yourself you squeeze and try to move your breasts up and down you shaft. Still spewing milk against the wall. you pump and pump. You feel it run up you shaft. with an arc it hits the tiled wall where it get washed away by milk.
A few minutes pass and with shaky knees you get the shower head and wash away milk and cum, the milk is still leaking out of your breasts, the cum isn't but you feel your balls filling up again, but your dick is laying flaccid on the tiles. you wash yourself off avoiding to make the water hit your nipples.
You dry yourself off and cloth yourself, stuffing breasts and dick into them with some difficulty. You exhale with of relief as your figure changes back to normal.
Calming down a bit more you start cooking.