Try getting her involved with Skeet or Trap. She might like that.
My inlaws hate me, they are antis. They do not want guns in their houses. While babysitting for their kids many years ago I took the kids to the skeet range. I had the kids sit inside the club house, while I shot and Sky worked the controls. When they saw Sky controlling the birds they were envious. Soon the oldest Kerry got me to take her skeet shooting (with her Dad's permission). Kerry turned into a lover of skeet. Kerry has introduced the other kids to skeet. Now the kids are grown, Some are married, some still living at home. Five of the seven shoot skeet regularly, and one boy (Michael) has multiple shotguns. Michael's parents are the most adamant anti gunners in the group. Michael's Mom hates guns, she does not like it that Michael has a vault in the garage, with all his shotguns there. She blames me for his passion, I love it. I love it, I'm an antagonistic old coot.
Michael is 22 now and has found Sporting Clays. That means more shotguns. I've invited him up here to go hunt Moose, he has not said whether he is coming or not. His mother is a big PETA supporter.