@andisoul I would call Michigan’s financial aid office and ask them. Generally the change in number of kids has an impact on aid based on the FASFA. There are plenty of great write ups out there. I like this one
https://www.edmit.me/blog/how-would-having-another-child-in-college-impact-our-financial-aid
Per the Michigan website, the grant is considered need base. So any change in need calcs would probably impact it.