Amy Schumer had to call it quits with Penn Badgley's wife, who was working as her doula while recovering from her C-section ... and looks had EVERYTHING to do with it.
Amy told the "You" star about firing his wife Domino Kirke on his podcast "Podcrushed" Tuesday ... she says qualifications weren't an issue here -- but she was like a goddess roaming her house, while Amy was feeling less than perfect.
A doula acts as a labor assistant for someone that's going through or just finished their pregnancy, providing emotional and physical support ... while it sounds like Domino did her job well, Amy just couldn't get over that perfect look.
She says the "floating siren" made her feel vulnerable after having her 1st kid ... and she couldn't stand melting to her touch for one second more. She admits she feels pretty bad about giving her the boot.