Girl's Behavior

Do you think she’s lying to me?

My girlfriend told a few days ago that she wanted me to look after our son this Saturday, because she was going to watch a play with her friend. Yesterday she turns to me and says “ oh remember tomorrow I’m going to the cinema with my sister. Oh sorry I don’t know why I said that, I’m actually going to see the play with my friend.”
I didn’t think much of it at the time, but later I was thinking, she as not be talking with her sister for many months, how is she going to make such a mistake.
Today, I asked her what time did the show start, and she told me it starts at 7pm, when I check it online it said that the show actually starts at 7.30pm. She even kept saying that she was late, because it started at 7pm. Around 11.15pm I called her and her phone was off. Five minutes later, she calls me to say that she’s on her way home.

I think there’s too many red flags that my indicate that she might be lying about were she went tonight.

Let me know what you think?

Thanks

Do you think she’s lying to me?
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