I don't want to put words in her mouth, but I think Lucy's point is that it's not the act of crossdressing, but how the spouse interprets the crossdressing. What are the words that come into her head when she finds out?
Pervert. Deviant. Gay. Queer. Fag. Girly-man. Weak. Submissive. Sissy. Limp-wristed wimp.
That's how society judges us, and instead of relying on what she knows about her husband, she accepts society's verdict. She is afraid to stand by her man, because she doesn't want to be be hit by any of those awful words that are hurled at us.
