Mount your wife doggie style,
Reach forward and grab her breasts,
Then say, "Gee, these feel just like your sister's."

Wow that is hilarious...

So basically you are using your superior size and strength to force yourself sexually on a woman who is no longer a willing participant.

Congratulations, you can now add rapist to what I'm sure is a long list of illustrious achievements in your life.

M.