Who informed you that she left the business?  Was it a reliable source?  If it was, there's your answer.

When I asked Zack about Nina, he said he didn't know if she would be back.  Too bad, she was a hottie.

She left the business so she could devote 100% of her time to me.....Ya, I only wish....

I'm just kidding, of course. I saw Nina several times. The first time I met her I would have been happy just kissing her for the entire session 'cuz she's such a passionate kisser. I'll miss her. I hope everything's OK with her and that she has a beautiful life from here on!