Wife confesses; to nothing?

Wife recently found my porn collection and discovered my love for sph and bukkake among other things. Last night, she told me about how a guy offered her big dick and to fuck her in exchange for fixing plumbing. She claims she did not do it, but only tells me this story monthes later. Earlier the same night she had teased me for having a little penis and little loads. I don't really believer her, what do you think? I wish she would have just been honest and said she needs big cock too and talk about how I could maybe watch etc. Instead she is denying everything. Also, about the time she mentioned her big dick story, she had been acting strange. Insterested in hearing your thoughts, especially women.