This LoRA adds Cumshots to Wan.
If you give it your friend's hot mom's Facebook photos, you can prompt a man to come in from the side and blow his load on her face.
Don't try to prompt a man's hair color, or he will look weird and they will kiss. Don't use a photo with another person's arm coming into the scene or it will hold a detached dick. The OP suggests using, "nude man comes in from the side" and then to prompt the cum.
You can have the woman love it, fill her with surprise, make her not mad but disappointed, or piss her off.