Milf gives me a fake smile and I just saw her with the boomer

I’m going on a holiday at a hotel and there is a milf that works at the hotel, the first day I saw her she was flushed and kept looking at me. She gave me a fake smile when I looked at her and I could tell she was interested. When I saw her again yesterday I gave her a nice smile and she smiled back. Today I saw her and she was talking to this old boomer guest and she laughed so I went to the desk and asked her a question and she just gave me a fake smile and rushed away. Is she just a woman and they want everyone so she can pick and choose. I’m 25 btw