Home wrecker

My older sister has been trying to get me and my boyfriend of 6 years to break up. She said to him that I was leaving him when I never said that. I love him more than anything so why would I leave him. To me, she said that my hubby didn't want to get married to me or have babies with me at all. I asked him about it and he said he never said any of those words. She won't even talk to him in the first place. Him and I were talking about having a baby the other day and all the wonderful were going to do with it. I don't get why she's acting like this. She's getting married next year.