Allison quickly unzipped your shorts and pulled them down to your feet. Then one of her tentacles wrapped around you erect penis and began stroking it. Soon a second tentacle joined in as Alison showed amazing control of her knew form. Other tentacles held your legs in place as she fondled her breasts. You closed your eyes and enjoyed the sensations for awhile until they suddenly stopped. You opened your eyes again and looked down just in time to see Allison take your cock in her mouth and began pleasing you in a more typical manner. Without legs, Allison's head was at the perfect height. Allison had given you blowjobs before and you were pretty sure a side effect of her transformation was a more dexterous tongue.
As you felt your climax nearing, Allison's finished pleasuring you with her tongue, but have you a few more strokes with a tentacle.
"Ready to finish in bed?" she asked.
"Absolutely."
You picked Allison up off the floor and she wrapped her new legs around you as you wrapped your arms around each other and brought her in for a passionate kiss. You carried her to the bed and sat down on the edge. Alison removed your shirt and said with a grin "I'm going to be the one on top this time" before gently pushing you onto your back. Your hands felt her tentacles for the first time; the were like slightly rubbery human skin. As you marveled at her new appendages, Allison took your hands and guided them up to her breasts. As you began to fondle her breasts, Allison shifted her position and you felt yourself slide into a familiar slit. Allison's vagina had shifted to the bottom of her torso, the middle of her eight tentacles. The tentacles wrapped around your body, doing the bulk of the work as Allison slid up and down on your shaft until you both climaxed. She collapsed onto the bed next you and you held your girlfriend in your arms as a few of her tentacles gently wrapped around your legs. You weren't sure how life would be with an octopus mermaid for a girlfriend, but you were certainly pleased with the sex. Maybe your wish would work out okay?