With a deep breath and a trembling hand, I finally manage to undo the clasp of my skirt. It falls to the floor around my feet, revealing my chunky body, fat round ass, and dark triangle of pubic hair. I'm completely naked now... except for the tiny thong that covers my most intimate parts. My heart is pounding so hard I can feel it in my throat as I wait for you to react.

My breath catches as you tell me to touch myself. I hesitate for a moment before slowly reaching down and slipping my fingers beneath the lace of my thong, finding warmth and wetness between my legs. My other hand trembles as it moves upwards, cupping one of my heavy breasts through my bra. The feeling is so intense, so forbidden... but it feels so good too. I close my eyes and begin to stroke myself, moaning softly into the darkness of the car.

Beth's cheeks redden even further at the mention of her husband. "No, I mean... it was just you and me." Her voice is barely above a whisper now. "I know we aren't supposed to..." She pauses, taking another deep breath before continuing, "But last night felt so good, and I couldn't help but wonder if maybe there was more between us than just being mother-in-law and son-in-law."

Beth bites her lip nervously, unsure how to respond. "I... I don't know," she says hesitantly. "Your father-in-law would be very upset if he found out..." Her voice trails off as she thinks about the possibility of doing it again, of giving in to this forbidden desire.

She looks at you, searching your eyes for some sign that you want her too, and finds herself wanting nothing more than to give in to whatever this is between the two of you.

The room is dimly lit, the shadows dancing across the walls as you guide her to the bed. She climbs onto the mattress, watching as you undress and reveal yourself to her once more. Her hands tremble with eagerness as she reaches out to touch you, tracing the lines of your abs before moving higher, cupping your erection in her palm.

"You're so big..." she whispers, marveling at the size of you.

A thrill races through her at your words, and with a sultry smile, she spreads her legs wide, inviting you closer. Her breath hitches as you position yourself at her entrance, and then she gasps as you push inside, filling her up once more.

Her nails dig into your shoulders, her body arching off the mattress in response to the pleasure coursing through her. "Oh god..." she moans, riding your thrusts with equal fervor.

Beth's face flushes with shame and embarrassment as she realizes the truth of your words. "I-I didn't know..." she stammers, looking away again. She bites her lower lip, feeling a mixture of guilt and desire coursing through her. The air between them crackles with an electric energy that neither of them knows how to navigate or understand.

Beth takes another step closer to you, drawn by the pull of your presence. "I-I'm sorry if I've been distant...or if it seemed like I didn't care," she whispers, her voice barely above a whisper. "It's just...I never expected things to be like this."

Her heart races as she waits for your response, hoping that there might still be a chance for something more between them despite the forbidden nature of their desires.

Beth nods hesitantly, her heart still racing from the intense pleasure you've given her. "Okay... but I don't want to get too messy..." She giggles nervously, unsure of how far she should let this go. "Maybe we could try... sitting down?"

Her hands tremble as she reaches for your belt again, trying to undo it in case you need more room to move inside her. The alcohol has made her bold but also left her feeling vulnerable and unsure of herself in this situation.

Together they manage to get into a sitting position on the backseat, facing each other. The angle feels different but no less intense as you slide back inside her. Beth moans softly, arching her back and wrapping her arms around your neck for support. Her breasts press against your chest, their nipples hard and aching for attention.

As you begin to move inside her, she whispers into your ear, "I never thought I'd do something like this... but it feels so good..."

Beth's breath hitches as you thrust deeper into her, the pleasure building inside her like a storm. Her cheeks flush red and she bites her lip to stifle a moan. The words you speak echo through her mind, taunting her with their implications. Desire wars with shame, making it impossible for her to focus on anything else.

"Okay," she finally whispers, her voice shaking. "I'm... I'm a guarra."

Her eyes squeeze shut as you thrust into her, the feel of your cock sliding in and out sending shockwaves of pleasure through her body. She arches her back, moaning softly as she tries to adjust to the new angle. Her fingers grip tightly at the seat, digging into the leather as she loses herself to the sensations overwhelming her.

"Oh god..." she gasps between ragged breaths. "Please... don't stop."