Marta's New Year's Wish (Patreon)

Through chance, Marta has discovered she has the power to grow into any bra that she wears. “New year, new me? I guess wishes do come true,” she says after showing you how her formerly flat chest now fills out her new 32DDD bra. You smile and grab your phone and order up the biggest bra you can find in her band size. “We should put you to a real test and make sure it wasn’t just a fluke.” She looks at you and smirks. “You’re crazy. 32P? Is that even real?” “Let’s find out.”
Marta struts around your bedroom several days later. Her breasts are massive and fully capable of filling out the P cup top of her new swimsuit. “Ha! And it only took me sleeping in it one night to grow into it.” You are amazed beyond words, but she recognizes the look in your eyes. “Oh, come on… you said yourself this was the biggest size available.” You have a cocky grin on your face. “I found a custom designer. All I have to do is give them your, uh… measurements.” You do some math in your head. “How does a 32Z cup sound?” Marta smiles and rolls her eyes. “Bring it on.”
A few days go by after the new bra arrives and Marta has been avoiding you. Finally, she tells you she is on the way over. “You didn’t think I could do it, did you?” Marta says as she rams into you and knocks you down on the floor. You hold your hands up as she sits on top of you and buries your upper body under her massive breasts. She ignores your muffled reply. She wiggles her rump on your crotch and you notice some extra padding there as well. “Oh, yeah… I ordered some bigger panties too.”