While your sister was texting to her girlfriend, Ondine mentally reminded you <Do you remember that you're still nude, Lou?> Then, looking at your genitals, she teasingly added <Unless you want a second round, of course.>
Blushing profusely, you rapidly got dressed.
<If only I could stay with you today…> Lamented a suddenly sad-looking Ondine. <But I need to go back to the barracks, especially since I still have all the administrative part of the job to do before I can sleep.>
<Don't worry, I'm not going to abandon you.> You responded, trying to soothe your wife. <I will come back tonight, and every night after it.>
That seemed to calm Ondine a bit. <Thanks. It's just that… Apparently, being apart during the first days after bonding his hard, for newly wed.>
You were a bit surprised by this. <Does our link have a range of some sort?>
<No, but being near each other seems to help better adjusting to being linked.> Ondine explained.
The two of you tenderly kissed each other a last time, before you followed your sister back to her home, wile your beloved got back to her duties.
- – — – -
You were hoping that you could go straight to bed upon entering the house, but apparently, Amelia couldn't let you sleep before knowing ‘all the juicy details’, to use her own terms. And alas, not even your sister was sensible to your pleas to let you sleep.
So, after sitting on the couch, and wanting to take the less time possible, you said the only thing you could. "Ondine engaged a conversation with me, but we barely started when another mermaid pushed me in the back, making me kiss my interlocutor." You could see the chocked expression on the girls face, but you didn't stop. "That gave us the urge to go have sex underwater, our mind blanking. Only when I successfully lost my virginity, Ondine's magic creating a deep-rooted link between our minds, we regained our senses."
Your sister and her girlfriend were even more chocked than before, briefly looking at each others, before simultaneously saying "YOU FORMED A BOND WITH A TOTAL STRANGER?!?" (Well… The only one who did scream this was Amelia. Natalie for her part, being mute, panicky signed it.)
You simply nodded.
At this, your sister looked at her lover, asking «Is that why you don't want to bond with me? So you don't force you on me?»
Amelia shook her head. "Your brother case is special, something called a deep-bond. It mean your brother found his soul-mate, even if she is a perfect stranger for now, placing them in a far from ideal situation. And on top of that, the consequences of deep-bonding on a human physiology is unknown. That's why we can't kiss Nat', because I fear what it could do to you."
After that, she suggested you should take a bath before going to bed.
- – — – -
At first, when you entered the tube, nothing happened. But since you simply let your legs dry after your little under-water sex-time, some salt clung to your skin, which slowly dissolving into your bath's water.
The now salty water triggered in you some kind of change.