Kevin lay on the bed and soon felt the serum began to take effect. Kevin's mermaid tail slowly split and reformed into legs, but that wasn't all. Kevin realized his chest was shrinking while other parts of his body took on more familiar shapes. Kevin felt something pushing out of his vagina and realized it was his penis returning. When it seemed all the changes had finished, Kevin slowly slid off the bed onto his feet and walked over to a mirror. The reflection looking back was his normal self. Lilia's serum had not simply returned him to human form, but his normal male form too.
Kevin walked back over to the bed where Lilia, still a mermaid, was eying him hungrily. He climbed back onto the bed with her.
"Like what you see?" Kevin asked teasingly.
"You have no idea" said Lilia and she kissed him passionately. "I've wanted to see you like this...to be with you like this... I was afraid. And now I want to apologize for putting this off for so long."
Lilia gently pushed Kevin onto his back on the bed then, licking her lips, lowered her mouth onto Kevin's erect penis. Fresh off his return to normal form, it didn't take much of Lilia's excellent tongue work to bring Kevin to a climax. Lilia did not hesitate to drink deeply.
Between his transformation and the best blowjob of his life, Kevin lay exhausted. He wrapped an arm around Lilia and the two lovers dozed again.