You wake up in the morning and feel your wife's arms around you, her body pressed against your back. You realize her arms don't feel right and look at them. Your wife's hands are gone! Examining further you realize her arms have become tentacles, although they are still flesh-colored. You slip from her grasp and sit up in bed, looking over her body for more changes. Her lower body seems unchanged from the night before - black and rubbery from the waist down, with eight tentacles instead of legs. Unlike an octopus or squid, none of her tentacles have suckers. As you sit there looking at her your wife stirs.
"Honey, look at your arms" you say.
She looks them and smiles. "I like it" she says. "If the tentacles that replaced my legs are any indication I can probably do just as much, if not more, with these than my old hands."
She reaches out and caresses the sides of your face with her new arm tentacles. The touch is partly familiar and partly alien.
You realize her voice sounds a little odd. "Did something change about your mouth?"
She shifts her jaw around then sticks a arm tentacle into her mouth, feeling around. After a moment she pulls her 'hand' back out.
"My mouth and throat seem a little tighter and more muscular." She pauses then adds "Also, this..." and sticks her tongue out.
You stare in amazement at her elongated tongue. Gene Simmons would be jealous.
"Let's see what I can do with this..." she says with a mischievous smirk.
Before you can react, she leans forward and takes your dick in her mouth. You can feel her tentacle-like tongue wrap around it, licking and stroking like no human tongue could. You harden almost instantly. She continues until she can taste your precum then her tongue seems to withdrawal. Her mouth tightens around you, seemingly a perfect fit. The muscles in her mouth and throat go to work. It's like the perfect vagina.
Your wife isn't letting you have all the fun. As she sucks you she slides a leg tentacle into her real vagina. She soon brings the both of you to climax together, her perfect mouth pumping you out and swallowing it all. Finally you're spent and she releases you, flopping back on the pillows with a satisfied smile.