Transfer to Tina

As you kissed Tina, you thought of transferring yourself to your younger sister. Since Kim's 22-year old body is more sensitive than your mom's, maybe Tina's young, 18-year old body would be even more sensitive?

Still kissing your younger sister, you focused on leaving Kim's body through the mouth. Eventually, you could feel your vision darken a bit as you lost control of Kim's body and you turn into a goo inside of Kim's throat. Then, you made your way up to Kim's mouth and you briefly see a glimpse of both Kim and Tina from a weird perspective: between their mouths. You continue slithering your way to Tina's mouth. You hear a slight yelp from her as you entered her mouth but it was soon drowned out by the intense kissing session between Tina and Kim. Before you knew it, you are in her mouth and eventually her stomach.

After a couple of moments, your vision shifts and the first thing you notice is your older sister, Kim, kissing you. You are now in Tina's body!