<human>: I'll try to be concise.  The situation is this:  
We were talking over voice comms one night, having a small discussion.  I say I'm going outside for a smoke, be back in a few.  I get back, gf is unresponsive.  After a few minutes, she texts via voice comm she's talking to her mom (who she lives with, so in person).  After waiting some more, it's getting late and I have to get up early, I write back exactly that, saying call me when you're done, I'm going to go lay in bed.  
  
After waiting a good 10 more minutes, I decided to call her and get the call waiting distinctive tone (short beep after the ring).  A few more calls and I get the same thing.  Finally she texts back on the voice comms that she's going to take the dog out for a walk and she'll call me in a few minutes.  I immediately call her phone and the call waiting tone is gone, replaced with a normal ring.    

I ask her who she was on the phone with, she says she wasn't on the phone, she was talking to her mom.  

At first I just let it go, but it started to bother me with some other stuffs going on.  So I bring it back up. She insists that she wasn't on the phone.  Now maybe computers or whatever is responsible for ringback tones might glitch sometimes (maybe???), it seems way too coincidental that it happened when she was unresponsive after just talking to her and the fact it disappeared as soon as she said she was about to call me.  

Now, would it be wrong to ask / expect a phone log to verify that was indeed the truth?

Can you give me the gist of the text in a nutshell?
<bot>: GF insists on not being on the phone when I got the call waiting ringtone.  Is it wrong to ask for proof she was telling the truth?