Still masturbating

Sally was still masturbating, evidentally having squirted several times as she watched her children fuck each other in the park. Her face was flush with arousal.

"Hey mom?" Alex approached her, ignoring the semen and girl drool dripping down the inside of her legs.

"H-huh? Oh yeah, good sex dearies," Sally made out.

"How about you join Pat and I?"

Sally felt like she shouldn't, but also knew she wouldn't be able to resist. Her horny kids were too enticing, especially with the smell of sex on them.

She meekly nodded.

They soon positioned themselves on the grass, Alex giving her mother a 69 while Pat approached from behind and penetrated his mother. Soon the incestuous threesome was actively pumping along, and the noise of grunts, moans, and the slapping of flesh again filled the air.

At some point in all this, the bottomless father and his son arrived, encouraging the sex by unloading onto Alex and her mother. Though by this point, Alex was so thoroughly slimed that it wasn't very easy to see where the new ejaculate had landed.

Pat in particular was very aroused: here he was, fucking his own mother, in the park, openly, with his sister playing support, and it was all normal. Encouraged, even! He moaned as he nutted a third time inside her.

After a bit, Alex started to get a bit sore and dismounted. Seeing that her brother was still going at it, she laid next to her mother and engaged in some low-intensity kissing and cuddling while her mother's flesh thrusted against her with each of Pat's pumps.

Eventually, he finished. He had cum inside her seven times, and still bore an erection as he pulled out. Alex surveyed the scene.

"Damn bro, you creamed mom really hard. Dr. Chen will be really proud, heh."

He smiled, blushing slightly.

After a short walk back, the sex-stained trio arrived back at home. Alex plopped onto their sofa, and began lightly masturbating. Pat likewise sat next to her, but just relaxed. They turned on the TV, which was currently showing a massive orgy at a university, apparently the school's 150th anniversary.

"Uh, kids? I'll take the shower first, then you can go?" Sally offered.

"Nah, I'll just stay like this. It's not like I'm done with sex for the day," Alex explained.

Pat nodded in agreement.

"Oh uh," Sally looked at her kids. She noticed that the sexual fluids on them were dripping onto the sofa. "Shouldn't you clean off? It might stain."

Alex sat up a bit. "These things are made to stand it, mom. This isn't back home. Besides at school, all the kids were fucking like this and the only time they washed was for PE. Or shower sex, I guess."

Sally nodded, but decided to still head upstairs for a shower.