There is nothing to be nervous about!
Watching the wife wrestle with another wife is the sexiest thing I have ever seen!
I have been lucky enough to see my wife do many irl, safe, sane, competitive matches with two other wives over the past 15 years...it is amazing!
I have even seen her do some sexy oil wrestling with another wife. That is beyond words sexy.
What is wrong with wanting to see your wife do something that really turns you own? I think it is great that we want to see our wife do this, and that we find it much hotter to watch the woman you love, as opposed to preferring other women.
As long as it is safe and no one gets hurt, and the wife is happy to try it, what is wrong with that? Nothing!
Actually....it is perfect!