to be fair if you want sound advice don't listen to any men on here unless they've been married and in this lifestyle for quite some time if you really want to know ask the women
If she has already said no respect her no and stop trying to convince her you're not going to convince her if anything you're going to agitate the fuck out of her just be happy she chose you and does participate in the fantasy
That is horrible advice and will definitely make her feel worse this should be something that is talked about on both of you are in sound frame of mind and it should be something that's talked about together not something he should convince her of