I recently discovered my gf's private twitter account

I recently discovered my girlfriend's private Twitter account she has 681 followers and follows 545 when my girlfriend and I first started dating she told me she didn't have Snapchat and her Snapchat account appeared on my list when I added her as a contact furthermore in the start of our relationship she mentioned that she had spoken with a married man and had no idea he also knows where she works and has paid her a visit I caught her flirting with another dude which really broke my spirit but that's not all what really struck me was that her Twitter back ground image is a screenshot of someone writing her happy birthday to you you deserve everything I hope you're doing well smiling face with hearts smiling face with hearts I don't want to receive the radilla but without many references GS don't know furthermore the screen photo is cropped so I can't determine whether it's a boy or a girl that texted him I'm looking for honest guidance