Hey I hope this is ok for me to ask has anyone made a story where before cadance marry shining armor twilight and cadance have a moment together and they share a kiss before cadance get's married ?

If you're talking like Twilight kisses her while Candance still loves Shining Armor, then no. The closest I've seen are a couple of stories where Cadance had been replaced before her relationship with Shining started, so she never had feelings for him to start with.