I agree. Whats the very best reaction you could get?
They all start and end with her hating you more than she did before the conversation began. You would actually be better off completely ignoring her rather than tell her about this.
What about: "I don't want to talk about it" "It doesn't matter how I know" "I've forgotten" "I like flying pink elephants and they have told me to not tell you"
All these are better than telling her. They all might frustrate her but thats not your problem. Blame the elephants.
M36 W31 S4 S2 T5 M4 BD Jan12 S July12 Recon Sep12-Nov12 ILBINILWY Jan13 OM x 2 in 2013 W wants R July 13 I start D. Jan 14. Meet GF Nov 13 Have I changed enough? Jul 14