<human>: I've newly entered a relationship with a girl I used to work with. We worked together for about 5 months and then once I left we started dating. It all progressed rather slowly as we started as friends first then realised there was something there.

Now I'm quite an introverted person so to that end I don't drink or go clubbing whatever. Given she's younger and into that sort of thing its not uncommon for her to go out each week dancing and drinking. I'm obviously invited but she understands that its not my thing and isn't hurt that I don't want to go, besides we spend heaps of time together anyway.

None of this bothers me, shes very attractive and often makes friends with randoms (mostly guys) and obviously in a club they are probably after her in some way. She's extremely trust worthy and very into me so I don't feel threatened and often encourage her to go out.

The issue is, when she does go out she still accepts drinks from guys for free. Given we're newly in a relationship and she's so used to getting free drinks from all the times she's been out in the past she probably hasn't really thought about what accepting a drink means when you are in a relationship. In my eyes its sort of accepting an invitation to something more.

Now the issue is not about her looking for something more and me worry about this, but rather the message she is portraying to guys she's meeting and her intentions. I know if I bought someone a drink and they accepted I'm thinking she might be into me. Am I alone on this thought? Or is my assumption correct?

Also how do I word this concern to her conveying this isn't a trust / jealousy issue but rather a you're in a relationship now and things might be different how you interact with others?

The best thing about her is she is EXTREMELY open and easy to talk to, doesn't take things the wrong way and is very caring. I just want to get my wording down right so I come across in a positive way.

Summarize the given text in a few sentences.
<bot>: My new girlfriend of a month accepts drinks from randoms at bars. I think this suggests to them that shes open to flirt / progress somewhere. How do I communicate this to her?