Derek Jeter was only the second person Mariah Carey had ever slept with. That is what the “Fantasy” singer reveals in her just-released memoir, “The Meaning of Mariah Carey.”

Mariah was still married to Tommy Mottola when she met and started her relationship with Jeter, but wanted to wait until her divorce papers went through before jumping in bed with him.

“After Carey finally got her divorce papers process — traveling to the Dominican Republic to get it done “with the quickness” — she flew straight to Tampa, where she and Derek finally consummated the relationship.

“Neither of us had wanted to cheapen our romance by cheating on my marriage,” she said, adding that the first time they had s-x was “so sensual” and claiming he was only the second person she’d slept with, ever.

“Everything was so new and sweet, down to the smooth texture of his honey-dipped skin. It was how it was supposed to feel,” she added.

While the relationship was “the catalyst” she needed “to get out from under Tommy’s gripping control and in touch” with her sensuality, it didn’t last.”

The Yankees shortstop had a longtime crush on Carey, hanging her posters in his bedroom as a teen, and even had a game plan to marry her.

“‘I had this plan,’ he told me. ‘I was going to come to New York. I was going to get on the Yankees. I was going to meet you, and I was going to steal you away from Tony Sony’ — his name for Tommy (Mottola, Carey’s first husband) — ‘and then we were going to get married.’”