If that works for you more power to you. If there is indeed a communication problem you being upfront is not going to solve it, especially in this situation. You need to deal with this situation accordingly. I experienced the same thing but it had nothing to do with cheating. This individual lied as well as was blatantly deceptive, although I did not confront them or inquire. I always respected their space as well as their word, but when things didn't add up, I took it upon myself to spy/snoop call it what you must and it was only then that I got the truth as well as woke up! Sometimes it just isn't worth behaving "mature" with certain individuals, because they take your decency as a weakness instead of respecting it!
Just imagine how frustrated you would be asking her and she continuously lies, but it obvious she is.
Vonda G. Nelson