The reality of one is not necessarily reality; and, though it is their reality it does not mean it is real. There is always another side.
However, you must remain sensitive to the fact that the perceived reality of another is real to them. You must make a choice to defend yourself and potentially ruin the relationship in proving what you know; or, you accept responsibility in feeding into the perception and love them through their reality. This is redemption in action. This is love.
I humbly choose love.
Be love and warrior strong for YHVH.