You're back from your long business trip but you noticed my pregnant belly. We both know your small dick didn't produce this, especially when I never let you cum inside me. I spill the truth and tell you I've been fucking your best friend while you've been away. He is so much better in bed than you, I'm done with the pity sex I give you.

Of course this isn't going to make you want to leave me, no instead you're going to be our cuckold. Paying for everything while he gets to cum inside me whenever he pleases.