I was planning to prank my wife at her parents house but she found out. Now she wont talk to me.
It sounds like your wife found your joke to be meanspirited. Why would you prank her in this manner?
I didn't say it was meanspirited, but I think it would be cool to pull a prank on her at her parents place.
Pranking your spouse is fine as long as it's safe and in good fun but doing it at her parents house is probably not the best idea. That's a good way to have her parents not like you and I'm sure she doesn't want to be embarrassed in front of them. You should probably apologize.
Whatever, I will apologize when I'm ready.
Apologies are meant to be for the other person, not you. Waiting until "you" are ready is selfish and shows that you feel the apology is more about you than actually being sorry. The longer you wait the more time she will have to be upset.