It seems my husband is living a double life. I'm not exactly sure what to think. We are always together and we?

have a solid marriage. He is usually honest with me, but I'm noticing he isn't honest with everyone else. He tells thees lavish lies to mostly family members and former school chums. But when they (the friends and family) talk to me about things he has said or "done" I'm left confused or having to attempt to cover for him. I have found myself snooping every now and then to try and see if I can come up with the truth or to see why he is lying. Now a mysterious woman has surfaced. Im not sure what to think. Can someone help me please?