Her mate tries to follow right behind her when she leaves the nest. If she is raped , he immediately copulates with her. He guards just before and during egg-laying. Other times, he joins the mobs. Similar pattern in mallard ducks.
Ducks have a phallus unlike most other birds.
This makes forced copulations more likely to be successful. If male sees his mate being forced to copulate, he immediately mates with her. Common, usually done with stealth. If male detects mate engaging in EPC, may re-mate or abandon her. Interesting story with respect to doves.