You go find Fiona

You rush out the door then pause a moment. Elsie or Fiona?

Fiona you decide. Fiona would mock you, but at least she already thought poorly of you. You didn't want to let your little sister see you like this or face her and ask her to finish your work.

You hear Fiona watching TV downstairs in the living room. You rush down the stairs and into the living room.

At first Fiona is stunned by your dress then a huge grin spreads across her face. Pulling her phone out she snaps a quick picture. "Oh my god, you are adorable. You must have made Mom very happy." She says, already knowing her mother's desire to see you in a dress.

You nod. "She was happy alright. But..."

Fiona interrupts you. "Did she...fuck you? In the ass?"

You were annoyed at the delay, your mom was waiting. "Yeah, we did that. But now..."

"Did you...did you take it all?"

You blush. "Yeah. And she loved it. But now she..."

"Holy...fucking...shit! You are a better woman than I am Jesse! Holy fuck, she is so fucking big around. You took that in the ass!?" She laughs. "Wow! You fucking slut!"

"Fiona would you listen to me!" You finally object. "I begged her to let me fuck her and..."

She interrupts yet again. "You fucked Mom??? In the cunt?"

"Yes!" You say exasperated. "And now she..."

"Oh Jesus Jesse. She's the only one that can take me all the way. And you fucked her with your little willy?"

"Yes!" You admit. "But she wants more."

She can't stop herself from laughing. "Ha ha ha. Oh my god, I would have loved to see that!"

"Fiona, stop. Would you listen, she needs a bigger cock right now."

"I'll bet she does! You'll be in big trouble if you can't get her off now. She's got a thing about that." She has a smugly satisfied grin on her face. "What was it like Jesse?"

"Fiona, would you mind...coming upstairs and...um...finishing the job." You plead.

"First you answer my questions. What was it like?"

"Loose...wet and loose." You answer impatiently.

"Did she like it?"

You are steamed but answer. "Not really. Honestly...I think she barely felt me. Can we please hurry this."

Fiona continues to grin. "This is just too good. I'll come satisfy her where you couldn't...on one condition."

"What is it?" You snap.

"I want to watch next time Mom gets that sweet little dress wearing ass of yours."

"Fiona!" You protest. She gives you a pleading look. "Fine! Okay, it's a deal."

She taps your cheek lightly. "Good girl. Let's go do this."

You lead Fiona back up the stairs and into your mother's room. She was still splayed out on the bed and currently playing with her clit.

"What took so long? Thanks for coming Fiona, I desperately need a real cock in me." Your mother says.

"You owe me Mom. I wasn't really in the mood right now." She says as she begins to undress.

"Sorry my girl, Jesse got me all worked up but couldn't finish the job." She sees your shoulders slump. "It's okay Jesse, you did your very best I am sure. Your best just isn't enough, it's not your fault sweetie. I'm glad it felt good for you though."

Fiona is stroking herself, getting herself ready. "I'm sure you got her pretty close Jesse. Size isn't that important, right?" She says in fake support.

Your mother is quiet for a time before saying. "He did his best. Now hurry up Fiona!"

Fiona looks down at your mess, her face screws up in disgust. "Clean up your mess Jesse. We all have to, it's only fair."

You begin looking around for a towel or tissue. Fiona grabs your hair and forces you down toward your mother's crotch. "Just slurp it up, you have to learn."

"Fiona, don't be so mean. Jesse, slurp that up so we can get going. I am going crazy here!" You mother says in a stern voice.

Both you and Fiona say. "Yes Mom."

You take a breath. You'd already gone so far today, why not a bit further. You lean down, hesitate for just a second as you smell your pungent load on her junk, then just dive in. You begin lapping it all up. It kind of tastes of metallic oysters, it is not pleasant but you persevere. Her cock twitches as you lick your jizz from her python.

"Flip over Ma, I want you doggy style." Fiona says. Your mother follows direction, just **** for a big cock in her cunt. You stand to the side, licking jizz off your lips. Fiona loves the sight.

"Looking good Jesse, looking good!" Fiona mocks. Your mother however misses the cruel tone to her voice.

"Doesn't he look good!? Isn't he beautiful Fiona?" Your mom's fetish was an odd one no doubt, not that you could talk right now.

"Oh yes Mom. He fills that dress out so nicely. It is appropriate given his little clit dick."

"Fiona, please don't tease him about...OHHHHHHHHH Jesus!" Fiona had buried her entire length into her mother. "Ohhhhh Jesus! I always forget how good you feel. Ohhhhhh!"

"Jesse, go to the front. Let's spit roast this thick bitch." Fiona says.

"I just came...twice." You say in defense. "I don't know if I can."

"You're young, you can take it. Besides, you'll have some stamina now."

"Ohhhhhh..." Your mother moans in delight at being filled to the brim. "...ohhh...come here baby boy. Let Mom make you feel good."

You go round to the front, your mom lifts your skirt and puts her head underneath. You soon feel as she sucks you limp dick into her eager mouth. You hear wet slurping sounds as she goes to work on you. Despite having just cum you find yourself getting hard once more. You rest your hands on her head, through the skirt of course.

Fiona is fucking her slow but hard, with long powerful thrusts. Your mom's moaning and groaning providing vibration to the blowjob she is giving you. Each strong thrust causes your mom's ass and back to ripple on impact. Her own big tits bounce up and down to the rhythm. You look across to see Fiona staring at you intently. Taking joy in every thrust being savored by her cock sleeve, taking joy in the fact you had just been in there and hadn't gotten the job done.

You start breathing heavy as your mom is really going at you with gusto. Her tongue swirls, her mouth sucks, she easily takes you all the way in. Stopping to lick your balls occasionally. You let out a little sigh and see your sister give you a wicked grin. Oh Jesus, it was the race thing again! She wanted a spit roast just so she could beat you at yet one more thing. Fiona was incorrigible.

She slaps her mom's big fat ass. "That's it Ma! Suck your pretty girl good. I think she's getting close."

Your mother redoubles her efforts. Shit she was good! So fucking good! This was a woman with decades of experience. Fiona begins picking up the pace, slamming into her hard and fast. Your mom is moaning so hard but trying desperately to get you off before letting you out of her mouth, you knew by her sounds and motions that she's already gotten off twice but she just kept on giving you head like a champion. She doesn't have to wait much longer as you feel it grip you. You grab the back of her head and slam in as deep as you can as you shoot whatever cum you've got left into the back of her throat. She moans and slurps.

Satisfied Fiona then picks it up for her final flurry. Your mother lets your rapidly softening spent manhood drop from her mouth and cries out in passion. "OHHHHHH GOD! Fiona you are unbelievable today! God!"

Fiona is going full ****. Grunting and growling as she builds up. Finally with a triumphant how she pulls out her massive member and unloads a seemingly impossible amount of jizz across her mother's ass and back.

She slaps your mom's ass a few times with her cock and wipes her brow. Your mother just collapses down onto the bed, moaning and overwhelmed with joy. Getting up off the bed Fiona gives you a wink. "Since I did you a favor I'll leave you to clean this up." She turns and heads out the door. Before she leaves she adds. "Remember our deal Jesse. I'm looking forward to seeing that."

You stroke your mom's sweaty hair as she lets out a deep satisfied sound. "....ohhhhh...that was....ohhhhh..."