"You know what, not right now. You should rest after you shapeshift into my mom and the other women you turned into," you reply to your shapeshifting girlfriend as you prefer her regular and average appearance.
"If you said so, honey," she replies. "And besides, I don't need to rest or anything, I have a lot of energy and stamina as I can shapeshift into anyone unlimited."
"I see," you respond. "So, babe. what do you want to do today?"
"I don't know, hun. But I've got something in mine," your girlfriend suggests. "Do you wanna watch some movies with each other, or you like to play some video games, or would you prefer to go out and have a date?"
"Hmm... that doesn't sound bad, well,... let's..."