The whole day, Marco and Erica wait for their sister to come home. They try to not to engage in any sexual acts as they do, so that they can be at top form for their sister. So they decided to watch a movie on the television while they waited.
Half way through the movie Erica looks over to her brother and asks, "Will you always be there for me?"
Marco is slightly taken aback by the question. After a few seconds linger on, he says, "Of course. He wraps her in a comforting hug. "You'll always be my special sister."
Erica snuggles into his embrace. "Thanks. I suppose I can share you with Sandy if she wants. She shouldn't miss out on all the fun." She looks up at him with an adoring smile on her face.
"Is that what you are worried about?" he asks.
"Well a little. I mean I just thought if Sandy is better than me, you may want her more."
Marco smiles at her. "There is no better. You are special in your own way as Sandy will be in hers. I love you sis." As they hug, Marco moves his hands down to her ass. "Speaking of which..."
"Why don't you save if for tonight," she replies playfully. She gives him a kiss before heading out of the room.
Left alone, Marco finishes watching the movie. By the time it is over, Sandy is walking through the door.
"Hey, Marco," she says. "How was your day?"
He shrugs and acts as casually as he can. "Not too bad."
"Where's Erica?" she asks placing her keys on the table.
"She's in her room."