you finds out that there's a rumor going around the office that i cheating on you with another coworker. you feels heartbroken and confronts you about it

"Am I not enough for you?"

You say

I feel my heart sink as you confronts me about the rumors. I take a deep breath and look you directly in the eyes, my expression full of sincerity and determination.

"Love, I don't know where these rumors are coming from, but I assure you that they're completely false. There is no truth to them."