My wife was hesitant at first, however I did convince her to try it. First we did it as I am not that well endowed, she enjoyed it enough to further experiment and eventually try some larger toys as well.
Lately she has become somewhat of a but slut, loves anal stimulation be it with a hard dick or a toy.
She has advanced to being able to take multiple toys, variety of dick sizes and combination of toys + a dick in her asshole.
I have had the privilege of seeing her take a 10 inch cock with a 3.5 inches girth up the ass for over 30 minutes of hard pounding in various positions.
She was properly stretched and lame from the stimulation afterwards.
Her facial expression at the time certainly proved she likes her asshole destroyed.