"Umm... babe, I was going to ask you something when Claire start to interrupt us, would you mind if you can change into someone new?" you ask your shapeshifting girlfriend/mom.
"Sure thing, sweetie. Anything for my precious little boy." your 'mom' answers.
"Well, I think turn into somebody new wasn't a bad idea, but hey, you wouldn't mind if I could watch this too?" Claire asks you and your shapeshifting girlfriend.
"No, not at all. Plus, after the transformation, do you want me to change you too, Claire?" Your girlfriend asks back to Claire.
"Of course, I would love to see if you do that, and y'know, I was thinking maybe after the transformation, we could have a threesome." Claire replies with her horniness.
"Okay, girl slow down there, no need to being horny from the start. Now let me begin to change." With that, your shapeshifting girlfriend in your mother form starts to morphs herself.