How long have you two been going at it? She's been showing you how good it can feel for a girl and she definitely knows what your new body likes. Your nipples seem especially sensitive, or maybe she just knows the right way to touch them. And how to suck on them.
The doorbell rings again and your girlfriend gets up to go answer it, leaving you to catch your breath. Her hips sway hypnotically as she crosses the room and her appearance shifts as she turns back to her normal self.
She lets Kanna in at the door and explanations are made.
"You make a really cute girl." Kanna smiles at you. "I see why Kitty likes you this way."
"Kitty" is the nickname some of the girls have for your girlfriend.
Kanna already knew about Kitty's shapeshifting ability, even if the two of them have never been more than friends. And now 'more than friends' is what Kitty is offering. Kanna admits that she's curious and takes her up on the offer. You're going to have a threesome!
"What kind of change do you want first?"
"Um. Can you be a cute redhead or something like that?" Kanna is a little flustered by the situation, and this is the first idea she can think of.
The change is immediate and colorful as your girlfriend's hair ripples bright orange and then settles on a more natural-looking auburn tone. Her eyes lighten to an emerald green color and a smattering of freckles cross the bridge of her nose. She looks like an absolute stereotype of what people who have never been to Ireland probably think Irish girls look like. It's a good look and you're not sure if you're more excited to get with her or Kanna first.