<human>: My gf had mentioned before a guy, let's call him John, she knows through work (not a work mate, she met him through a previous job) who she had asked for help in getting a new job. Ultimately he was not able to help her. I don't remember if she has told me in the past if she ever dated him before we were together, but I suspect she did date him. 

Anyway I'm kind of a jealous guy (insecure but not aggressively jealous) and the other day I checked her phone when she was in a shower and saw that she had messages from this guy where he (about two months ago) offered to pay for her to go on vacation with him and then two or three weeks ago messaged her saying he wished she was going on vacation with him. She politely declined to his offer and then when he sent the follow up messages she exploded at him about how he can't just expect girls to hook up with him when he wanted and then not call them the rest of the time etc. She also told him that she has a man now and she's not interested. I thought she handled it well but they're still in touch and now she's giving him recommendations for his holiday (she knows the country he's going to - he probably booked the holiday specifically because he thought she could go with him).

Basically it's pretty clear the guy is only interested in one thing. He's a recruiter so I think she's in touch with him because she thinks she can use his contacts rather than because she seems him as an actual friend (they never hang out as far as I know). I want to ask her to just cut off contact with him, but if I do it's going to be obvious that I checked her phone without her permission. Should I just trust her to handle this guy, or should I bring it up with her?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Snuck a look at my gf's phone and an acquaintance of hers is hitting on her. She's handling it well but I'd rather she just cut off contact with him. What should I do?