Oikawa x reader -the steps of overcoming adultery with your spouse

Oikawa has admitted to sleeping with another woman during your marriage, and begged your forgiveness and your willingness to work over this with him.
"Please don't, don't just bring us to an end."
You're going to work over this mountain with him together, and if you both work really hard -then maybe, just maybe- you can both grow together.

or

Step by step instructions of trying to overcome adultery in your marriage with your spouse featuring a guilty and desperate Oikawa and a reader who holds all the power.