Pull out

You decide not to risk impregnating Vanessa and quickly pull out. She turns her head to look behind and see what's going on just as you begin to cum. You spray her firm ass and back with your load. White lines cover her ass cheeks and trail up towards the small of her back. She cries out in disgust, "Ugh, what are you doing?"

You finish cumming and wipe the tip on her ass cheek. She stands up and punches you in the arm. "I told you to cum inside me, jerk."

A few awkward exchanges and less than sincere goodbyes later, you leave your ex-wife's house satisfied, and one more thing checked off the list.