Ok so SIL is getting married. Her FI, I mean boyfriend, told her that he has the ring and they will get married as soon as she quits smoking. I found out that he hasn't proposed yet but is planning to even though she already invited people and has set plans to get married in Mexico next year. He told me that she did quit smoking there and she told him that she was done. Well, my H went to Mexico this year with her on a family vacation and he said she smoked the entire time. I feel obligated to tell him or that Jordan should just so he knows that she is lying to him. I need some help and input on this. I don't know what to do. If she found out we told on her she would b beyond pissed but I know her bf and he is a great guy and doesnt deserve to be lied to, especially since it is about marriage. Please help me figure this out!