Revealing The Truth

There are many many men and women who would tell you just how horny I am in bed.
They'd also tell you that I've done just about everything sexual with both sexes, and with multiple partners at once.
The precise amount of lovers I've had and been fucked by, I cannot say. Because sometimes during an orgy I wasn't sure whose cock was fucking my pussy, mouth or arsehole. Or whose pussy I was tonguing.
What I can say, is its well over two hundred people that I've had sex with.
Now I'm married and extremely happily married too.
He's gorgeous in every way, but mostly in a loving caring and supportive way.
Our sex isn't the kind of brutal sex I'm used to. It's far more loving and definitely how I want my life partner to be with me now.
Why I'm here, is my husband doesn't know about my past, but could easily do so if our new neighbour let's him know about my past.
She's someone I had sexual relations with when I was in my mid twenties. And she was at some of the wild orgies I took part in.
She's not said anything so far, but I do fear she might.
So what do I do. Do I tell him and risk everything. Or do I speak to her and hope she now sees I live a totally different life.