Has anyone turned their mermaid into a vampire?

Before anyone asks I had something happen in my game, but I didn't go through with it. This is what is going on. I am playing a mermaid who is employed as a Conservationist, and she loves what she is doing. One night my mermaid got a phone call from a woman and asked if she wanted to hang out at her place. I went ahead and had my sim go over, and they had a nice visit. This woman also is a vampire. Something I also discovered is since my sim went over to visit, I now have vampires showing up at my mermaid's home every night, and there are at least two vampires who show up during the night. I think I might have triggered something when I sent my sim over to visit this vampire, who lives in Willow Creek.

Now to my question, has anyone turned their mermaid into a vampire? Have you done this, and if so what happened? Did they remain a mermaid, or did they lose that part of themselves when they turned? If they remained a mermaid when they transitioned, did they have both abilities of the mermaid and vampire?

I didn't have my sim do this, because for her this would have been awful, because she loves being out in the sun, and saving her island home.