Step daughters/Asexual/1st Wednesday/play room
You get down at eye-level with Sandra and give her a gentle smile. "Hey." You say in a gentle but authoritative voice. "How about we leave your sister alone to watch her cartoons, let's go to your room so we're not bothering her." You catch a very quick appreciative flash of a glance and a smile from Marsha as she hears this, although Sandra's reaction, while positive, shows a considerable lack of the consideration you are trying to show her sister.
"Ok!" She screams, loud enough to make herself a nuisance and then begins pulling on your hand. "Let's go! Common! It's this way!" She says. You give Marsha a quick look of apology before deciding the quickest way to end her sister's inconsiderate levels of volume is to follow her quickly before there's another outburst.
She leads you to her room and lets go of your hand the moment you arrive as she runs inside to show off with a huge smile. She lifts up her arms in something of a "ta-dah" like pose as her gesture sweeps the entire room, but it's pretty obvious she's more interested in some kind of physical play with you rather than showing off her room. You are more than happy to oblige.
You immediately go and scoop the little ball of energy up, electing a giant laugh from her. You just can't resist the wriggly little ball of energy and begin tickling her belly. She grins and giggles as her body convulses in on itself while she tries to block your tickling hand. "Staaa... ha-ha." She giggles, seemingly stopping herself from telling you to stop, probably on reflex.
Well, now you have this little girl at your mercy. You withdraw your tickling hand and use it to support her body better as you snake the other hand already holding her around to pull up her shirt. She let her guard down for a moment when she saw your tickling hand go away, and you immediately blow a big raspberry into her now exposed belly, getting an actual screech of delight from the kid as she, nonetheless, is trying to push your face away.
"What is that!?" She demands. Did her mother never blow raspberries on her belly before? Well, she DID seem pretty overworked.
"I'm blowing on your belly." You tell her, and then promptly do it again, electing even more giggles out of her. You take the opportunity while she's distracted to walk over to her bed, and then you immediately drop her on the mattress the very moment you get done slobbering on her.
Once again, the little girl shrieks at the sudden loss of support and as she bounces on the bed. She squirms around and looks up at you, and then immediately lays back down and pulls her shirt all the way up to her neck, revealing her flat chest and tiny 4-year-old nipples. "Do it again!" She demands, and you are more than happy to oblige, blowing even more raspberries on her belly button, right over her stomach, and on her nipples. She seems to be seriously enjoying this new game.