Access to webpage restricted to Twitter followers

Hi, I got a simple project: I want the ability to restrict pages on my wordpress site to my twitter followers. If a person who is not my follower visits the page they will only see the excerp. They have to sign in to twitter (on the same page through oAuth?) and follow me, after which the content will be visible. Content must become available through ajax (without page reload). Preferably delivered as a wordpress plugin, where I as a siteowner type in my user name in the plugin settings, and given the ability afterwards to "protect" my pages through an extra option in the writing panel. Cheers, Jesper