Frustrated

April
My sister told a lie that my boyfriend of 6 years said to my brother in law that he doesn't want to marry me or have babies. Sorry a little confusing. She's telling my mom and other family members. I was standing right there when he talked to my brother in law. He just said hi and how is his job going. I'm getting frustrated because they make him out to be this horrible guy. He's a great man! He provides for his family, helps around the house, is very hard working, handsome, and takes very good care of us. I love him with all my heart. I'm just getting tired when people say he is lying to me. He has never lied to me at all about anything. We're very open to eachother because we're best friends and have no secrets. My sister is known for lying all the time. She told my hubby that I was leaving him and I never said that. Should I confront her or what?