Communicating via Earpiece Traveling the Multiverse chapter 18 by dellobenedetto

Rouge's ears picked up the soft sound of something being teleported in close by, akin to the effect of Chaos Control. Glancing around, she noticed what looked like an earpiece. "Where on earth could this be from," she noted in surprise, before deciding to pick it up and place it in her ear—she was a skilled thief—er, treasure hunter, after all. Whoever was on the other end, she'd be able to easily mess with should it come to that. "Hello?"

"Hello!" You called out from where you were in Rouge's breast, having generated an earpiece for yourself as well. "Are you receiving me, Rouge?"
"Loud and clear," she answered with a chuckle. "So, you're the one who summoned this earpiece for me, cutie? Quite a clever one, huh."
"Y-yep," you answered, currently swimming the backstroke in the now-expansive lake of milk. "It's... a bit complicated how I made it, but I figured it's better than needing to exit your body to talk to you."
"Hmmhm, good point." Rouge adjusted her breastplate, freeing one of her boobs and letting a few drops of milk drip out of her tit onto a finger—which she then put in her mouth, allowing her to taste the fruits of your magical labor. "Mmmm... This is delicious! I feel pretty invigorated just from that sample! You went above and beyond with the job here, sweetie~!"
"Aheh, th-thanks... I figured you'd want something really good, if you were gonna use it to tease people. I made sure to make your boobs really bouncy, too, a-and I ensured they wouldn't weigh you down while flying."
"Aw, you really thought of everything!" She hugged you as best she could, which translated to using her arms as a temporary bra for a few seconds. "Thanks so much for doing this for me. Seems I was right to let you explore my body."
"Th-thank you... a-actually, i-if I may ask something...?"
"Hmm? What is it?"

"I-I..." You were nervous about asking more of Rouge, and even with the inspiring taste of the milk around you, it felt like it took all your strength to continue speaking. "...I-I would... l-love to stay inside your body. I-I'd leave it occasionally, of course! ...B-but getting to explore it, and make it even better... th-that would be an honor..."
"Hmm... I'm not against it," she answered, patting her boobs and making little waves ripple around you as she put her breastplate back on. "Feel free to make yourself at home in there, then. I'll let you know if I want anything."
"Thank you!"

Relieved by her agreeing, you turned down the earpiece volume for now, and used your magic to create a little home next to the milk shore—nothing too fancy, not yet, you weren't ready after the spells you've used so far in the past hour to make the whole secret base you were dreaming of. But even just having what you have so far, inside the boobs of such a beautiful bat, is absolutely astonishing. It felt like, in some ways, you had a new lease on life... even if it was partially at the whims of Rouge.