You're the Havok in my Life- An Alex Summers...
Ria McCoy is the sister to Hank McCoy, and works with him at Division X or the CIA. She, too, is a mutant, and takes an interest when Charles, Erik and Raven visit the facility. Being dragged into the team of mutants, she meets Alex Summers. The one problem is that he bullies her brother, but will she change his ways or are they destined to stay apart?
All rights go to Stan Lee and Marvel, I only own Ria.