My Girlfriend's Sister's Fiance Is Hitting On Her

My Girlfriend's Sister's Fiance Is Hitting On Her

My girlfriend came around last Friday and stayed till Saturday. I went through her phone with her permission, of course. I didn't see anything serious. Out of curiosity I checked her chats with her sister's fiance, I saw some uncomfortable messages he sent to her. He sent messages like WHEN LAST DID YOU KISS? HAVE YOU BEEN IN LOVE BEFORE? SEND ME YOUR PICTURES, SEND ME VOICE NOTE, CAN I BE YOUR VAL OR I KILL MYSELF. This man is