25M feeling insecure in long distance relationship

dating this girl for over a month now, we met online, and have met couple of times since then, also been physically involved. She has a job but her coworkers creeps me out. She's 24 and most of her coworkers are men and almost double her age. She previously told me many times that her she's quite frank with her colleagues, the office atmosphere is chill and they share double meaning jokes every now and then. I was pretty cool with it cuz its seemed normal. She goes out drinking after office once a week, where they don't get wasted but have only 2-3 drinks, have a good laugh and leave for their home. Now this time she told me that one of her colleague (45+ man) started a conversation while they were drinking, that how she's so cool and fun and said "ki teri suhagraat to dekhne layak hogi" (that your wedding night would be so fun i bet) and she laughed it off saying something about it, and they talked about it more i guess, she told this to me when she got back home and seemed pretty chill about it cuz she was laughing. But i felt creeped out by this, the guy was her father's age and talking about her suhagraat, i confronted her with this ki I'm not comfortable with this, she said don't worry, he's a good person and it's common in our office. Now they are planning a trip to some place next weekend and they all will be together, where only one girl is same her age, and only one other woman, and rest are those creepy middle aged guys. I'm feeling so insecure about it, what should i do?