In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.

Sentence1: Tom fed his baby boy another spoonful of banana baby food. Sentence2: The boy wouldn't take the last bite, instead reaching for Tom's food. Sentence3: Tom looked at his own bowl of unsugared grapefruit slices. Sentence4: After making sure his wife wasn't nearby, he let his son lick a slice. Sentence5: When the boy started crying, he had to assure his wife all was well.
Baby, Wife, Tom