<span>The house guest, Mrs. Stein exaggerated Eliza’s words and made it seem like she didn’t like Grandma, but only wanted her money.</span>
I’m assuming your asking if your supposed to use “a” or “an”.
Since where your putting a/an is followed by the word ordinary, which starts with the vowel “o” you would use the word “an”. Anytime the following word starts with a vowel you use an.