I found my best friends boyfriend on tinder

The other day I found my best friends boyfriend of 7 months on tinder. I hate this guy, he is so toxic and treats her terribly. I sent it to her, not accusing him of anything. But it is a recent picture and has his new job, so I know he has been on it recently. He has convinced her that tinder automatically updates your profile through Facebook and Instagram. I don’t know what to do or if there is even anything I can do. Advice??