Same here, haven't done it yet But she finally said yes for a one time try. I have been talking to her about it for about 2-3 years. Not pushing too much. It went from I don't want it to maybe to finally yes for a try. Each step was made by introducing dildos with bigger size slowly. And the final nail was buying a strap on and fucking her brains out with the big 10" black dildo. While I was pounding her doggystyle I asked her, would you prefer a real one, she said maybe, then I went would you do it for me, I would love so much seeing you getting fucked and would you like feeling him cumming in you, feeling his cum deep in your pussy. She was moaning continue And at my upmost surprise she said I can try one time. Man I almost lost it haha. Now it's being 3 days in a row that we fuck with the strapon and she is really enjoying her black dildo so I guess it's the beginning of finding the right bull
My advice: take your time and don't push too hard. That's the sure way to have the inverse effect on your wife if she is a bit shy. Good luck to you!