I Am Looking for Mary Kelly of Iowa

I am researching for Mary Kelly of Iowa. I don't have much but I know she was born in December before 1990. She was married to William Sullivan Sr. They have one son named William Sullivan. I don't have an exact date of birth and I don't know when she died. She might have had the middle name of Ann. If anyone has records of her that could share with me I would be so grateful! I need to find more information on her.