No, don't say anything about it, it will only cause a fight or awkward R talk and it'll blow your source of intelligence on her. But, if you keep spying, it will only do you no good in the long run. You will not be able to detach from her like you need to. I'm not at all saying my situation could have ended up any differently, but I do know that the spying backfired on me...I came to realize I was only doing it to indeed catch her in lies so I could "punish" her later.
I did post one time that I didn't have anything against spying whatsoever, but I was wrong. That said, I repeat, don't let her know you know about this text. Nothing good will come from it.
M-34 XW-32 D-7 Found OM's presence 4/09 Separated 12/09 Divorced 8/10 GREAT relationship as coparents since 8/10