A story and question [MF]

I will not talk about how me and wife’s **** reached to this level, It’s long story, I’m 24, she is 44 and hot, now she wants me, I can’t believe it, is that because I’m young and good looking guy and trusted person or she is a slut and no one knows her past…?, the important thing is how I can **** her?, wait to be alone with her and kiss her?, I’m afraid to make progress, she is afraid too, so how I can approach her sexually?