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.
Q: Sentence1: I met my step son when he was 4 years old. Sentence2: I fell in love with him at first sight. Sentence3: It took him a while longer to warm up to me. Sentence4: I remember talking him for a walk and trying to hold his hand. Sentence5: He let me know right away I was not the momma.
A:
I (myself), Warm, Love, Step son