Is it normal that i meet my moms ex?

I've recently reacquainted myself with an ex bf of my moms and it's getting to the point where our lunch, drinks, dinner meetings are filled with so much sexual tension. Years ago this man, incredibly handsome, tall athletic, and very sexy dated my mom for a couple years. He's wealthy, powerful and mom and I were spoiled rotten by his generosity.

At night I heard the noises, that familiar sound I heard often as he brought mom to orgasm time after time...mom left for the office and I would sometimes see him shower. I was sexually active but yearned for his touch. Mom found him with another woman and ended it. I bumped into him recently and gave him my number, my bf travels a lot with his job, so I meet him. A few days ago he told me he wants to have me sleep over at his house as his wife and daughter are on vacation. As he dropped me off at my place he grabbed my arm and told me that he knew that I watched him shower. He said that my mom told him nasty things about me when he asked about me during sex, that when she was drunk she would give in and it sent him wild...I'm meeting him Sunday...is it ok?