My wife & sharing

Couple days ago I've show my wife some interracial and cuckold photos and movies and ask her if she would like to have such a Big Cock in her who would fuck her good like these women on movies?

She replied: that she would like me to fuck her such as those men on movies
Me: I can't I'm not so big and good in fucking.
She just smiled and said we will have to practice......

I'm small and wanna be cuck who will just watch how my wife fuck other men and will never fuck her like that.
What do you think if she will be able to start in the future being a slut wife?
I don't wanna push her so she will get mad.

What can I do more now? and if she will finally cuckold me?