Help her

You quickly open the door to find Tessa on the floor in her towel applying sunscreen. You sigh in frustration and start to walk back out. "Don't leave, I need some help with the sun screen. I can't reach everywhere on my own." You sit yourself behind her fumbling to keep the towel on. She hands you the bottle and drops the towel exposing her breasts. You don't see anything but the sides from the angle you're at. Slowly you start rubbing the sun screen up and down her back, pressing deep into her shoulder blades. You then work your self to her sides, trying to avoid contact with her breasts, but she then grabs your lotiony hands and guides them around her boobs. You begin to enjoy the soft texture and so does she. Tessa lets go of your hands and puts them inside her towel. You let your fingers work themselves around her nipples getting her massive bosom moist and smotth from the sun screen. You can feel yourself getting hard from the experience, but you can't stop yourself. Tessa starts to let let out soft moans as get another hand full of sun screen and smear it down and up her arms.

You start to get lower, holding her wrists. Soon your down with her hands where she's slowing fingering herself. You don't where to go from there until you feel your second head poke into something, followed by a jump from Aunt Tessa. "I guess it's your turn sweety." She turns around and wrap her towel covered legs around you and uncovers your hardened member. Tessa's eyes widen at it's sheer size. "Sissy's been raising a horse, that's bigger than brother or your daddy! Let me get something for good measure."

Tessa gets up unveiling her whole body and goes to grab something from the inside of the bottom sink cabinet. It's a pink colored dildo. Tessa comes down to the floor ans wraps her legs around you, this time minus the towel. "You'd never believe the stuff your mom has hiding around here, now on to see what you're mom's milk is really doing to you." She grabs the dildo and lines it up with your penis which towers over it. "My, oh my. You're the biggest in the family tree as now, 14 inches. Chell raised a nice one." You respond back, "Well, I've never really thought much of it. I just thought it was the norm."

Tessa giggles and grabs a handful of lotion and starts stroking your overgrown epimdage. She takes her time and can't help, but stare at it every now and then. She speeds up after a while, progressively getting faster. She stops when you start to develop some precum. Tessa kisses the tip of your member and licks it off. " I don't want to spoil you, now do I." Honestly you were trying to hold it in.

Tessa helps you up and gives a tight hug, pressing her wet cunt against your still erect cock. "Oh my sweet nephew, I could alreasy picture what our kids would be like..."