Ondine didn't got the time to explain why you shouldn't kiss her. Instead, someone strongly pushed you in the back, making you fall on top of the siren, your lisps touching hers.
Immediately, your minds blanked and your body went to auto-pilot mode. What started as an accidental kiss become intense and passionate, your tongues wrestling each other. Without ending the kiss, you both dived in the cove's water, undressing each others hurriedly.
Ondine was now breathing for you both. Still not breaking, the kiss calmed down. But what your entangled mouth lost in passion, the rest of your two bodies rapidly gained it in ardour.
Your now erect penis brushed the mermaid's tail at it's base, searching the entrance of her vagina. Each time your rock hard cock brushed it's objective, your two blank minds stroked each others in a similar way. Finally, you entered.
Upon scumming inside her, you sensed some sort of psychic bond forming between you.
Your minds slowly returning to normal, the two of you swam to the surface, before breaking your unending kiss. But that bond between your minds, in contrast, was still here.
Seeing how exhausted Ondine and you were, two mermen gendarmes transported you on a small beach inside the cove. Every merfolks drew back from the path, like if the adjutant and you were sacred relics. After they deposited the two of you delicately on the sand, the older gendarme said "You two should rest, deep-bonds are known to be tiring when forming." Then, addressing specifically his superior, he added "I will inform sub-adjutant Ledge you want him to assume command for the rest of the night, my adjutant."
A weak "Thanks, seaman." was all the siren was able to respond.
"Sir." The younger one said, addressing you. "I know it must be frightening for an earth-walker to have a telepathic link with someone else, but you don't have anything to fear. The adjutant's mind and yours aren't going to merge, nor absorb each others. According to what my father used to say, as long as the two of you take it easy that will come naturally. So just speak in each others head for the time being, okay?"