Logically, you're leaping to an assumption there. If women ask, "Is my boyfriend cheating?" it could be because he is, or it could be because she's insecure about someone cheating on her.
"Is my boyfriend cheating?" is not the same statement as "My boyfriend is cheating" and one doesn't imply the other.
"Is my boyfriend cheating?" is not the same statement as "My boyfriend is cheating" and one doesn't imply the other.