I saw this super cute early twenties blonde girl at a club and i was heading in to approach her when some random older guy who was at least 40 walked up behind her and just started grinding on her

I started laughing as i figured it would be easier now cause i could just ā€œsaveā€ her from him. However to my surprise she kept grinding on him. even more surprising her friends walked away and left them alone.

i figured she was probably just looking for action that night and didn’t really care who it was. about 10 minutes later i came back and they were still grinding. she had a blank expression on her face so i couldn’t tell if she was into it or not but ended up just leaving

I still think i should have at least done something so she would know some it was an old creep behind her but i didn’t overstep. anyone here have similar scenarios or what would you have done