I guess you have a few options:

1. Run with it! Make all his fantasies come true by getting a pedi and let him massage your feet and love you for loving him enough to indulge his fetishes.
2. Run away! Decide that it's just too weird for you and move on.
3. Do nothing. Stay as you are, let him have his foot porn time (it isn't hurting you or anyone else.) Carry on with your lives.