Sentencing isn't up to the DA, that's up to the judge.
And with a couple of minutes of research I've found Ohio statute 2921.31 in which it states that
<< (A) No person, without privilege to do so and with purpose to prevent, obstruct, or delay the performance by a public official of any authorized act within the public official's official capacity, shall do any act that hampers or impedes a public official in the performance of the public official's lawful duties.
(B) Whoever violates this section is guilty of obstructing official business. Except as otherwise provided in this division, obstructing official business is a misdemeanor of the second degree. If a violation of this section creates a risk of physical harm to any person, obstructing official business is a felony of the fifth degree. >>
Depending on what the boyfriend had done, she was at least guilty of a 2nd degree misdemeanor or if the boyfriend was a violent offender her action could be construed as a felony. Whatever the case, harboring a criminal seems like it should be punished more severely than having to write something 100 times.