Is my wife cheating on me?

First of all my wife started to take her phone everywhere. Never laying it down more than a foot away from her reach. She doesn't even charge it at night. The other day she was showing me something on her phone when I noticed her facebook app and Facebook messenger app had a little I icon in the bottom right corner of them. I asked her what is that? She said she didn't know. So later on I Google it and it said that it was called dual apps on Samsung phones. Dual apps- I found out Is cloning of the same exact app so you can basically have 2 of the same app on your phone. I also went through her phone after I found out about dual apps and it turns out she is using Samsung secure folder. !! So what do you all think. She's always on the phone constantly.
She also sent me a screen shot of a picture on her facebook and at the bottom of her facebook profile in the screen shot was a small heart shaped icon that said dating. I don't have that icon on my Facebook. Please I need opinions?
Is my wife cheating on me?
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