It had been nearly three weeks since Toriel's spontaneous fling with Ralsei. That weekend turned into a bit of an eye opener as she had discovered her attraction to younger men as well as a kink for incestuous roleplay. In addition to finding a new lover in Ralsei (though he did eventually have to return to his home) she found that Kris had some distinctly non-familial feelings for her.


Kris had been extremely pleased to join his friend in fucking her when he walked in on Ralsei plowing her on the couch. With a previously unseen level of confidence her adopted son had stripped his lower half naked, walked right up to her and pushed his cock between her lips. Toriel had never tried to please two partners in her life but judging by the moans Kris let out as she sucked and licked and kissed his cock she did just fine. The needy look in his eyes as he stared 
At her bobbing head was a real fire lighter for Toriel. The feel of his hands brushing through the fur of her face and more so how he grabbed her horns and held her face against his groin as he came were huge turn ons. She came as she gulped down the thick globs of cum Kris unloaded into her mouth. She had nearly forgotten Ralsei until she felt his cum splash against her back, the young goat having been told not to cum in her again.


Her adoptive son wasn’t even close to done with her though much to her delight. Toriel was gently pushed onto her back Ralsei only just avoiding being pinned beneath her. Kris pounced on her, pinning her hips in place and motorboating her tits as his still hard cock throbbed against her pussy. 


“Give momma that cock… Shove it right in Kris.” she encouraged as she rubbed her breasts in his face. Kris let out a needy moan as he slipped back just enough for the tip of his cock to slide between the folds of her sex. Kris was as Toriel would soon discover an absolutely wild fuck. The boy had no restraint, no rhythm but his above average equipment and enthusiasm were what Toriel really loved.


“Momma… mmm mom your pussy is so good!” Kris said pounding her sex with every inch he had to give. Toriel wasn’t sure which she loved more: the acknowledgement of their relation or the sound of his balls slapping her ass as he shook her body with every thrust.

“Ooh Kris! Momma loves your cock! Fuck me hard baby give me all you got!” Toriel had replied as she tried to rock her hips in time with her sons to no avail.  She came hard just before Kris did, she locked her legs behind his hips holding him to her as he filled her up.


After that Ralsei had explained the where and how of his arrival before Kris led him into the attic where he vanished through a dark doorway. Toriel hadn’t gotten dressed though and Kris seemed more than content to remain unclothed from the waist down. For the rest of the day each snuck peeks at the other but neither was truly trying to hide their admiration. More than once the fact Kris was looking at her started to get Toriel hot. Likewise she could see his cock start to stiffen as he realized where she was looking.


The real shift in their relationship started a day and a half later, getting home from school she cast aside her suit jacket and promptly realized that Kris was watching her disrobe with interest, his shorts tented by the forming erection. Well Toriel was more than happy to continue the show, stripping her top over her head and casting it to the floor. The mother grinned lecherously as her son took his shirt off to match her. Unhooking her bra she flicked the straps down and let the garment fall to the floor exposing her naked breasts which she gave a shake. Her skirt hit the ground right after, and she was shocked to see the front of her panties damp, unaware of how much this was turning her on. Peeling herself free of her panties she stood before Kris totally naked and eager for what was coming next. Kris joined her in nudity stripping his pants and underwear off as fast as he could manage revealing his cock standing at full erection and throbbing with need. They didn’t make it to the couch. Toriel pushed her son to the floor and mounted him.

“Momma’s on top this time.” She cooed as she slid his cock into her and began to bounce her hips in his lap slowly at first but then faster and faster till she had to grab her breasts and hold them in place. Kris’ fingers gripped her thighs before sliding to her ample backside squeezing her ass like it was a life raft in the middle of the ocean. Kris wasn’t simply lying there with strength that shocked the mother goat he pushed his hips up to meet hers. Toriel stared down at her son delighting in the lewd grin plastered on his face as she rode his cock like it was a prize bull. “Let mommy know when you are gonna finish kay sweetie?” Toriel requested as she had a mini orgasm before leaning over Kris further popping her left nipple into his mouth. Kris nodded as he started to suckle of her tit and grabbed hold of her breasts massaging the tender flesh as Toriel bounced faster.


“Mom I’m coming!” Kris shouted as the tit slipped from his lips. Toriel had intended to pull off him but instead she planted her hips pinning him down as her womb was filled with his seed once again.


Neither of them wore clothes the rest of the evening. Dinner was cooked, served and eaten with both being on full display for the other. They showered and dried off as quickly as they could before going to bed without a stitch of clothing. Toriel insisted on Kris sleeping in her bed and Kris didn’t put up too much fuss about it.


From that day on though mother monster and human child were much closer more free about their sexual urges for each other.  The very next day Toriel gave Kris instructions on how to eat her out and then sucked him off. The day after Toriel and Kris watched a porno together for about a minute before they bothe decided it was more fun to just fuck. Toriel woke with a particular desire and roused her son from sleep with a tit-job. Kris returned the favor the very next morning suckling from her tits as he fingered her sex. On the drive to school Toriel reached over and tucked her hands into Kris’s underwear stroking him off.


Through it all the past few weeks as Toriel's love for her son had grown and changed she couldn’t be happier. Ralsei would be visiting on Saturday and the thought of two young boys calling her momma as they drilled her holes was more than enough to soak her panties. She left work early to visit the one adult toy shop in town picking up a few replacements for her lost stash. She envisioned the boys using them on her once they had exhausted themselves. 


Toriel was so engrossed in her imaginings that when she got home and found Kris asleep sitting on the couch with homework splayed around she couldn’t help herself. She fished his cock from his shorts and licked it to an erection before slurping on it hungrily bobbing her head up and down. She was so busy sucking Kriss off she didn’t notice Noelle step out of the bathroom in the hall and immediately duck back into it when the reindeer saw what was going on. Kris came waking up as his cock filled the monster's mouth.  The boy smiled before tucking his cock away and explaining that Noelle was here making Toriel stand quickly and look around. Noelle awkwardly feigned having just gotten through with the bathroom before walking into the hall. She wasn’t completely sure what she had just seen happen but she knew something for sure; she thought it was hot.