<human>: Can you condense the text into three sentences or less?

I have been dating a girl for three months. We get along pretty well, we do have our dumb arguments over nothing, but I thought that was normal. Both of us were single for awhile until we met each other.

Early on she would receive texts from other guys and I told her I didn't care if she responded or not (it was new, we hadn't been on anything but a few dates). Since then we have decided to be together. We see each other quite often (4-6 times a week, depending the week). I have told her that she can obviously have guy friends, but certain guys that she has gone on dates with in the past don't want to just be friends.

Some times things are going really well. At certain times, we argue about really silly things. Parking spots, which route to take when going out... She has even admitted to me that she will sometimes push my buttons to get me upset for her advantage. I asked "Why would do this?" and her response was "I don't know." I can't wrap my head around why she would do such things.

Ever since we met, she has always deleted her text messages and e-mails, she states she has always done this and always claims that she has nothing to hide. Whenever I bring it up, she gets defensive and tells me "It's none of your business, I have nothing to hide. Do you pay my phone bill? I didn't think so."

Do people actually do this? Am I wrong to think it's odd that she deletes all her texts and e-mails? Why would someone knowingly say things to upset their SO?
<bot>: SO of 3 months deletes all her phone messages, says she has nothing to hide and has always done it. Does anyone actually ever do this?