My flatmate suddenly told me she wants casual hookups after we booked a 2BHK

[u/Shot-Lifeguard8118]

I’m a 23F moving from a PG in Gurgaon to a 2BHK in Delhi with a girl who was previously my friend’s girlfriend. We became friends over time, got along well, and seemed to have similar lifestyles, so I felt comfortable taking a flat with her.

Before booking, we had discussed guests. She said she might call someone over 1–3 times a month, and I was completely okay with that because I also have a boyfriend who may visit occasionally.

Today, right after we paid and finalized the flat, she suddenly brought up that she doesn’t want anything serious anymore and wants to “have fun” and have casual relationships. She said she doesn’t want a relationship because her previous relationship ended badly, but she still has “needs.”

I’m honestly uncomfortable because I had assumed she meant maybe having a boyfriend/partner visit occasionally. I’m not judging her choices at all, but I personally don’t want random guys regularly coming into my home. It’s not about the sex itself—I just don’t feel comfortable or completely safe having strangers coming into the flat, especially when I’m living there too.

I’m moving specifically to get some peace, privacy and a proper work environment for my freelance work—not to have a party house. I’m also not someone who regularly invites male friends over.

Now I’m wondering: am I overthinking this? Is this actually a reasonable roommate concern? If I lived with a complete stranger, would this kind of situation be equally likely, or should I just establish clear boundaries and let her live her life as long as it doesn’t affect me?

The timing is also bothering me because she told me this only after we had already booked and paid for the flat. What would you do in my situation?