Lois bet she wouldn’t have more than five minutes, tops, before Mrs. Cox wrangled herself away from Perry’s inquiries.
She underestimates Perry's persistence.
Would Lex videotape his own office?
I wouldn't be surprised.
Would Lex want photographic evidence of what he did, or whom he did in the case of Mrs. Cox, behind closed doors?
The later sounds like the type of crazy thing Luthor would do.