No. In Ohio, infidelity does not directly impact the award of spousal support. The state's laws regarding support are primarily concerned with the economic needs of the spouses and their ability to pay, rather than the reasons for the marriage's breakdown.
However, it's important to understand how economic fault is considered by the courts. If your spouse has spent a significant amount of marital funds on a third party, and you can provide proof of this spending, this can affect the financial aspects of your divorce. Specifically, any marital money that was used in this manner will be "added back" into the marital assets for division. This means that the court will take into account this spending when dividing marital assets and liabilities, potentially affecting the overall division of property and finances.
Therefore, while your spouse's unfaithfulness might impact the division of marital assets if there was economic fault involved, it does not directly lead to an award of spousal support.