Mind blowen

My 9 year daughter started to talk to me bout last names because ours are different and she wanted to know if her changed too when I got married. Long story short after talking to her she wants he step dad to adopt her & also have his last name.

I've went threw explaining adoption and everything I needed to go over with her. This is 100% her choice, she even said she wanted 2 last names because she grew up with my maiden name.

Does anyone hopefully in iowa know the law for step parent adoption?

Her sperm donor hasn't been in her life since she was 3, she turning 10 in August. He's not even on her birth certificate.

Her current last name is my maiden name.