Could I be overthinking or did she do this intentionally?

Before starting my shift I was sitting down talking to a guy co worker at my job. We have friendly, professional, funny conversation. As we were talking, another co worker, who I believe he talks to on a more intimate level, walked up to where we were and started talking to him. I don’t think they’re boyfriend/girlfriend because he talks to a few of the women at work on a more intimate level but you can tell they like each other. Out of nowhere, while I was still sitting there, she started to caress his head/hair. She pushed the front of her body in between his legs and pretty much got really up close and personal with him. It was kind of awkward and he ended up telling her basically that right now wasn’t the place for that because they were at work and cameras are everywhere but I couldn’t help but to believe that she only did that because I was right there.

Could I be overthinking or did she do this intentionally?
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