Well is she pregnet? You didn't have sex with her! If she's pregnet she cheated on you, big time!
Her Vajayjay smells like mangoo and you haven't been anywhere near her in a while?
She is seeming distant and dosn't give the energy that she used to. She makes excuses about where she has been or dosn't call or come home like normal. When the usual daily routine that she has is changed in an unlikly and unexplainable way.