Girl code???

HELP PLEASE!

Ok so my friend was hooking up with this guy that’s in our friend group we all hang out and have mutual friends and everything. She was hooking up with him for maybe about 6 months(situation-ship basically) she had feelings for him at one point but never bf/gf and she eventually ended it with him because she met a NEW guy and they then started dating and still dating to this day very much in love and all that.

Now here’s the tea sis that same guy that she hooked up with for 6 months (situationship) is also a close guy friend of mine we never liked each other like that but we always flirt and there’s always sexual tension between him and I but just recently like last week we were hanging out cuz were literally really close friends he kissed me and gave me head. It just happened...I know messy messy messy

Now I’m struggling to tell her because I’m her friend and that’s technically a guy she used to have feelings for and I basically just hooked up with him.

I wanna tell her but I have a feeling she’s gonna be mad at me because she’s told me that she misses the friendship she had with him because they no longer talk and he’s mad that she played him like that ( the guy that we both hooked up with). But at the same time she used to hook up with guys that were friends with each other all the time. Like for example the guy that she messed with for 6 months (situation-ship) she would also hook up with his friends and they never let that get in the way of their friendship so Im hoping she understands that’s she’s done the same thing so I hope she doesn’t get mad.

What do y’all think? Am I breaking girl code? And no the guy and I haven’t had sex but I have feeling that now that we’ve hooked up once it could possibly be just something casual at least that’s what he’s implying

HELP ME PLEASE!!!🤦‍♀️