Step daughters/Asexual/1st Wednesday/play room/Push it
You decide to take her arm and blow a raspberry on it, without getting all that much success due to it being covered up by her shirt. "Well, that didn't work very well." You say, and then immediately pull her shirt up over her head and blow another one on her shoulder as you are pulling her shirt off her arms. She just giggles and doesn't complain a bit. When you move onto removing her pants as well, she just lifts up her hips on her own and lets you, and she seems to already be expecting it when you place her thigh in your mouth and blow on that as well, electing a shriek from her as she pushes on your head for a second.
"Noooo... nooo!" She says, but the giant smile in her tone and on her face tells you she's not actually telling you to stop. After you blow one more on the inside of her knee, getting another fit of giggles out of her, she actually spreads her legs wide open for you, showing off her panty-covered crotch, being the last place on her entire body covered by even a single article of clothing.