Dealing with unhelpful comments

My step father suffered from foot-in-mouth disease....If ever there was a wrong thing to say, you could be sure it would be him. Once he put me in a similar situation in a social setting (not regarding cancer, but another medical issue), so I flipped the tables on him. He had recently had prostate surgery so I replied (in a carrying voice)..."Well I'm tired about talking about my medical problems, how have you been since your prostatectomy? Have you had any issues with impotence or incontinence at all?" Needless to say that shut him up...quick smart. However it must be said, I detested the man and wasn't worried about any future relationship as we were about to move to Australia. In your case, I would ask your husband to point out that discussing your possible demise (in a round about way) is not entirely a suitable conversation to have in front of the seven year old daughter of the person in question...you. If ever there was an award of The Most Insensitive Comment Ever...he would get a "distinguished" medal. What a prat.