By Andrew McCarty Earlier this week, Los Angeles Rams quarterback Matthew Stafford finally joined Instagram. On Friday afternoon, Stafford posted a picture of himself flaunting his Super Bowl ring. Stafford’s post included this caption: “She’s a real beauty.” In the photo, Stafford’s wife, Kelly, was notably cropped out. Well, Kelly saw Matt’s post and fired back with a post of her own on Instagram. She cropped out Stafford’s face, kept the ring and then zoomed in on herself. “We look good together,” she said about the ring. Adam Schefter tweeted out Kelly’s Instagram picture, which got the at…