While you regretted the comforting familiarity of your bed during this first night of sleep since your change, it was compensated by the comforting presence of your wife at your side. Not a bad trade as far as you were concerned.
— – - – —
You knew of the guards and that came with Ondine, her brother and her sister-in-law, you hadn't noted she also took some doctors with them to check on your health after your transformation. Said doctors confirmed that you were a perfectly healthy siren, although a male one, surprisingly.
But what surprised you in their diagnostic was about your voice. According to them, since you didn't use your vocal cords since you started changing, they may be able to make you able to speak without hypnotizing anyone. To do so they need to operate, and surgery is always a bit risky, but you were willing to take it.
After the operation, you woke up in your new, fish-tank-like bedding, Ondine brushing some hair out of your eyes while smiling at you. Your throat felt extremely sore, a bit painful even, but you supposed it was normal.
The first two weeks after the surgery, you stayed on the floor of your tank, your wife carefully feeding you. Then, once you had sufficiently healed, she started to give you lessons on how to use that fishtail of yours to move under water.
Full recovery took you two month, and during that time, you also learned that when you formed your deep bond with Ondine, you also made her pregnant.