requesting to give pose for photos to third person

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one of my friend have been married for two years. her husband very much interested of having her photos some how 80 or 90% nude. She allowed his request and has been giving poses whatever he asked. Somehow she didn't felt any problem as all the photos taken from a polaroid camera that too by her husband. Now he came with a new request to her asking that give poses for photos before his friend who is a photographer by profession. My friend said that to me and asking for a suggestion. Any way she is hesitating to expose before other man in the presence of her husband. What u say.