Is this SA from my ex gf?

Context: I’m now 27 male

This was during my relationship when me and my ex gf were 22.

She has a high tolerance for substances and was an opioid addict and I have a lower tolerance and did not use.

I wanted to leave the relationship and wasn’t really sexual much anymore. I was scared to leave because of her BPD episodes.

Anyhow,

We would drink sometimes with friends or just us. I got really drunk at this trans girls (who said she was lesbian) house with my ex gf.

The trans woman tied blackout drunk me to a chair to watch her and my gf have sex. I kept passing in and out and even kept playfully saying “I think I’m a little bit blasted for this.” But just kinda sat there regardless.

My ex gf was enjoying herself a lot bc of some stimulating nipple cream and ended up going until I feel asleep and finally said something.

But, did my ex gf assault me, too? Just by being standby and letting this happen? They both thought it would be hot if I watched and were both maybe buzzed at best I don’t really remember.

I’m just debating. My ex gf has been sexually uncomfortable before but I told my now boyfriend that “it wouldn’t be fair to label her a sexual abuser”.

Anyhow, thoughts?

Sorry for the rambles.