In the state of Ohio, is it illegal for an 18 year old male to have sex with a 16 year old female?

we've been dating for 6 months, and 4 or 5 months ago her parents sat down and we "talked" and they said if they ever catch/find out we are/had sex, they would file and press charges, and id become a registered sex offender and go to jail. does anyone know how much of this is actually true? thank you
Update: well now im just confused, one answer says its illegal the other says its not haha. im just curious as to how far they could take it and how serious the court would look at it. that law says "between thirteen and sixteen" im not sure how technical it gets but she's 16 and a half she'll be 17... show more well now im just confused, one answer says its illegal the other says its not haha. im just curious as to how far they could take it and how serious the court would look at it.

that law says "between thirteen and sixteen" im not sure how technical it gets but she's 16 and a half she'll be 17 in december..so she'll be 17 this year. ill be 19 next march.
Update 2: okay...that website says it is legal for a 16 year old to consent to have sex with someone older..but since shes still a minor cant her father still press charges?
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