Well...

I remember events that based on external clues, must have happened when I was 2yo. (None of them sexual :p )

It is possible that he told her he started at 2.

But memory, and early childhood memory particularly, is a funny thing. I see no reason why I remember what I remember aged before 6, and not other things that others tell me about that stage, that I do not remember. Although, I do remember some things that, retrospectively, are both funny and revealing.

Like when I watched Teddy Roosevelt in a TV debate and started crying because he gave me creeps.