Face it, you never had a strong will. All it took was one hit to your gut and one foot in your face to crush your will completely. You came to a revelation, Supergirl was your superior, you should just surrend to her.

You look at her feet, you've never really done anything like this and it seems wierd. Still, with your will now crushed, you fell compelled to do what she says. You then begin to lick her feet. They taste very salty, sweaty and dirty but that doesnt stop you, you know now that stopping will get you punished.

Supergirl notices that you've changed a bit and aren't fighting her anymore. She smiles and saids, "hm... I've been needing a new footslave, maybe you could be it, but first... to test you she takes her foot off your face, gets off you and walks over to the bathroom. She then closes the door and presumably does her business.

You don't even bother to get up, your will has been that crushed. You stay there and just wait for her to get back. As you had just recently realized she was you superior and a goddess the idea of being her footslave sounds strangely attractive. Her feet smelled horrible and repulsed you but you suddenly had this strange feeling that if it would make her happy, you would gladly smell and lick them.

Supergirl came out of the bathroom and got an excited grin on her face. "Know that you're like this... you would make an excellent footslave. I want my feet worshipped... but maybe I should test you more, see if I really have dominated you."

And she decided...