“Do you mind if I have some privacy with Jeff and the pc mum, I promise I won’t do anything to you without your consent” your sister says while holding you in her hand
“Sure thing hun, just holla if you need anything” your mum walks out the room leaving you in your sisters hand.
When your mum leaves the room she goes to the pc and places you next to it, you can’t see it but doubt you’re going to like what she has planned. She goes through the program for a few minutes until you hear her say it ready.
“So brother I have decided that while I like mums idea of you ‘supporting me’”
she uses air quotes
“I think I’ve thought of a much better way that mean I don’t have to remember which bra you are or wash you carefully. I’m sure you will learn to enjoy it all the same though”
She takes off her top and you see her previously modest breasts are now massive, if she wasn’t your sister you would have been very excited to see these massive mammaries. Stephanie picks you up and puts you on, you feel a tingle as you are sucked inside her breasts. You are in complete darkness with no senses for a few minutes until you see your sister topless in front of a mirror.
“I was wondering when you’d wake up Jeff, what do you think?” She cups her breasts and you feel her hands on you
(What have you done to me Steph?) you say mentally to her
“I’ve merged you with my boobs, but there’s more than that. I’ve made it so that my boobs don’t droop, I will never need to wear a bra again” she jumps up and down and you notice her boobs don’t bounce at all they stay perfectly against her chest
(That’s actually quite clever to be honest, though I’m not sure exactly why I would enjoy this) you say
“Well I’ve also double my sensitivity in you and my pussy so we’re going to be enjoying each other’s company, also I’m sure you’ll enjoy the girls changing room and my girlfriend”
(when you put it that way I suppose I could learn to like this, though I would like to be myself again at some point)
“Yeah yeah, I’m not going to keep you here for good brother, but you should know that I’ve altered reality so that you are know as my boobs when you’re not a part of me.”