Legal Question in Criminal Law in Michigan

First, your math's off. If she's 15 now, she'll be 16 in less than "14 months". The real question is how old she was when the (alleged) sex occurred. Second, whether he gets charged depends on a lot of factors, not the least of which is whether there's proof beyond a reasonable doubt that he engaged in criminal sexual conduct with her -- and if she IS pregnant and DNA proves that he's the father then that may clinch that issue, but if she's not pregnant then there remains the question of what credible evidence there is to prove he engaged in CSC. Third, whether he gets charged for a voluntary boyfriend-girlfriend sexual encounter is a question of which county the case is in because some prosecutors take a more by-the-book position on charging under-age CSCs, and others might choose to not charge here because there was no force/coercion, no injury, because they had been dating, etc.