Jeff watched as his mother kicked off her shoes, unzipped her pants and slipped them and her panties off, now standing fully naked in their backyard. She meandered a bit, enjoying the peace and the greenery before settling down onto one of the reclining lawn chairs, resting her eyes. She leaned back, resting her four arms on top of each other on the armrests.
After a moment, she moved a bit, seemingly trying to get more comfortable. She leaned back a little more and spread her legs, apparently more satisfied with that position. With her legs spread, her next evolution became immediately obvious to Jeff, who watched as another left hand spread her pussy from within, growing out through it. She sat indifferently on the chair as the addition slowly lengthened out of her, bending upward once the elbow had emerged, before relaxing back down onto the chair as the rest of the arm emerged, slowing to a stop.
A few minutes passed as Jeff stared slack-jawed through the window, though his 5-armed mother's changes seemed to have run their course for the time being. Before long, Irene stood back up, stretching the four arms on her shoulders up and out, while identically stretching the one within her pussy down toward the grass, before dropping them all downward again, heading back inside.
Thinking quickly, Jeff pulled out his wallet and dropped it before walking across the kitchen.
"Ahh, I'm feeling much better now." Irene said, stepping back in. "Sorry about that, I must have just needed some fresh air."
"It's ok! I'm glad you're doing well." Jeff replied. Irene smiled, then accidentally stepped on Jeff's wallet, looking down to see what it was.
"Oh Jeff, you dropped something sweetie."
Jeff turned around to see his mother crouch down just slightly, her pussy-arm reaching down and picking the wallet up, walking over and reaching up to hand it back to him.
"Oh! Thanks!" Jeff felt his heart race as he took his wallet from his mother's new limb.
"You're welcome! Now I hope you're feeling hungry."
~~~
After a fairly uneventful meal, Irene stood up and began collecting the dishes with her four uppermost hands. To Jeff's surprise though, she then got up onto the table on her knees, casual as could be, reaching out with her lowest arm to grab the last few plates. She hopped back down, bringing them over to the counter.
"Huh," Jeff thought, "I guess since it's 'normal' for her to have this fifth arm, then whatever she has to do to use it is 'normal' too." His suspicions were furthered as his mother loaded the dishes into the sink, climbing onto the counter on her knees. Her long legs let her straddle the sink, with her pussy right above it. Her pussy-arm began scrubbing the dishes, and she crouched forward, reaching down with the other four, getting an assembly line going between them all.
Jeff watched in awe of his mother's use of her evolved body, not to mention the view he was getting of her nice ass. It was practically presented to him, with the height it was at and her legs spread like that. Plus her reflection in the window in front of her let him still see her eight tits, from the plump ones down to the perky ones.
After only four or five minutes, Irene had fully cleaned everything, giving a satisfied sigh.
"I'll be in the den watching TV if you need anything sweetie."