Years ago a friend, whom I had cooked for many times, suggested that to thank me, she would make her "family" recipe chicken stew. She assured me it was the best chicken stew EVER.
It was disgusting! A slimy, tasteless swamp.
You obviously know they like chicken - and "wet" food. Do you not have a good chicken recipe that you feel confident about that you could use? Better that than to try to replicate something that will never match their expectations.
Plus, who is to say that just because their son says they like chicken stew, that they wouldn't like to try something different!