I really just want to know for fact that it was short term and there was nothing behind it, no feelings etc.
You need to discuss this with your MC first. You need to be able to articulate this to your wife in a non-threatening way.
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.