You go first

You shake your head. "No, I think I got this," you said, flashing a smile which Gwen returned.

There, in front of you, was something you tried rather hard to get a look at when you were younger. From peeking through doorways to considering hiding in Gwen's room, or setting up a spy camera, you wanted a look at your older sister's most private part of her body, and all it took was getting turned into a hot, knocked up, girl.

Eagerly you dove in, but almost immediately Gwen jumped back.

"Jesus John— Um, Summer. Go gently. And don't use your teeth."

"Sorry," you blush, sheepishly.

Slowly this time you move your face into Gwen's crotch, kissing repeatedly. You lick across the entry, pushing harder until your tongue slides in. One finger, then two are inserted as you contiue the long, sucking kisses.

You keep fingering and sucking on Gwen's pussy as she gives you encouraging moans, occasionally throwing your name in, which gets you really excited. It's not long before Gwen orgasms a first time, then a second just shortly after.

"Okay hot stuff," Gwen breathed heavily. "Its your turn now."