First, thank you for sharing. Second, congrats on successfully exposing your fetish to her.
My wife has the same reaction: she doesn't think that her feet are anything special, and is confused about my interest in them. My advice would be to start simple, perhaps just a scarf or bathrobe belt (our favorite) gently binding the ankles. Some evenings after the kids are asleep I'll tie her in that manner, face down on the couch so that her soles are exposed. Nothing major, simply stroking and kissing the feet, usually when she's playing Skyrim or watching television. If she's interested enough, I can even use my fingers or a vibrator to bring her to orgasm several times.
Whatever your preference, have fun and good luck!