Choosing to remain, the first direct chat between you ensues Tiny Misadventures, the Interactive text story chapter 9 by Calvitonks

Without a second thought, you execute the last part of your plan: remaining still to return to the giantess's side instead of fully escaping her.

If you had any regrets about it, the time to act upon them is soon over after a few precious seconds, for Shina recovers from the climax, taking deep breaths before she opens her eyes. Her expression is one of sheer panic, as she expects that her tiny immediately ran away as tinies usually do once outside their owner’s body, despite the many clear dangers of the outside world.

In a tone matching her face, she exclaims:

"Oh no, I shot him out when I came! Where did he go? Please, tiny, come back here!"

"Down here, Shina! Down here!" you exclaim loudly while waving your arms to make it easier for her to spot you on the floor. She gasps, surprised when she sees you still, before quickly grabbing you, lifting your tiny form through the air, before stopping you before her face, the first time since you met her.

Looking at you with blushing cheeks and a happy smile, she presses you against her, rubbing you against her skin while speaking in an excited tone:
"Aw, I'm so lucky to already have such a loyal and loving pet! Didn't want to leave your beloved owner? Yes, that must be it..."

"Nah, not really..." you commented in a neutral tone.

"Then...why did you choose to remain with me? You could easily run and hide from me while I was still recovering from the climax, right?"

"Correct, but I had already decided that remaining with you is the better alternative: my size would limit my range of movement, force me to live off scavenging leftovers while attempting not to be found by anyone; that’s not a way of life I find worth living.”

"Oh, I see..." says Shina in a sad tone: she wanted to believe that your short time together had already bonded you both.

This reaction makes you feel somewhat sorry for her, and thus, you try to cheer her up a bit by saying:
"Well, there is also the matter that you're cute and sexy: it makes my job to please you a lot more bearable."
"Aw, thank you, tiny gentleman, I appreciate what you did just know: it makes me happy to know that my pet finds me cute," Shina replies, her smile returning to her face 

As she shoves you back inside her nipple, she gives you a warning in a weary tone:
“Now, unlike other girls, I appreciate your comments, but please don't get any wild ideas, ok?

You nod in understanding, the implication of her message clear. And so, you’re back inside her mammary gland, closing your eyes for sleep while thinking about the way you're going to interact with your "owner" for the time being.