Start slow and gentle
From Torg Adventure
You smile at her and lick your lips. She grins back.
"You look like my birthday, Christmas, Easter, and the Fourth of July all wrapped up into one package," you say, looking her up and down with a smile.
"Let me see you. Take off your clothes, please. I wanna see," Milly says from her relaxed position.
You begin to take off your shirt, unbuttoning it slowly. Milly caresses her body as she watches. You take the shirt off, revealing your flat stomach and muscular chest and arms. Next your shoes come off. Your sister's hands rub across her breasts, squeezing them a little. Her eyes never leave your form. You unsnap your jeans and pull them down to your feet. Standing on one leg, you pull a leg off, then switch to the other foot and take the other pant leg off. You stand before Milly in your boxers and socks. The socks go next, one at a time. Your boxers project out from your body significantly. One of her hands drifts down to her pussy. She lightly strokes her mound, licking her lips at your stripping.
"Oh, stop teasing! Let me see it!" she whines playfully. You yank hard on your boxers, pulling them down and making your rod waggle up and down. Milly gasps and then giggles. "Did you get hard because of me?" she says as she looks up at you uncertainly.
"Yes, Milly. You are so sexy, and I want you very much," you say, reassuring her. "The thought of making your first time really special is very exciting. I want to give you so many orgasms."
Milly sits up, her head about a foot from your cock. Her eyes follow its movements, until she reaches out and tentatively grasps it at the base. You moan involuntarily. She strokes you a little too hard, and you say, "Not so hard, sweetie. Go gently." Looking up at you, she shifts her hand and lightens her grip.
You let her for a bit, then say, "That feels great, but I don't want to squirt all over you. Let me touch you now."
How do you touch her?