cheat

Hey everyone! A long-time lurker, first-time poster here. I discovered this forum a couple of years ago after the break-up with my GF and I’m eternally grateful for all the information I got here. Now it’s my turn to give back and, hopefully, I'll not only analyze the situation I’m in but help...

I've been dating this girl and a few weeks ago, after a couple of drinks she said that she would not cheat on her boyfriend...(good), but that if it happened she would not tell him (bad). Is this enough to just think about her as a fwb and nothing more?