Did my ex lie about how drunk she got?

(First and second picture is how much is in the bottle now. Third picture is how it looked when I just got it, completely full. Fourth picture are details on the back of the bottle).

A little backstory: I got this bottle on my 20th birthday, almost a year ago. It was a gift from my mom, meant more to serve the “tradition” of buying a bottle of alcohol as a gift to someone who’s turned old enough to drink. She brought it because the bottle was fitting for me (I’m queer and have a bit of a dark/gothic/metal style, so a rainbow skull bottle was perfect lol).

I’ve never been interested in drinking alcohol, and besides half a glass of rose wine I’ve never tried the stuff. I’ve grown up around alcoholic parental figures, and as an effect I’ve instead just felt repulsed by the idea of drinking. So I’ve never had a sip from this bottle.

I was in a relationship with a girl who liked alcohol a lot more, though. She had a lot of issues, and while I don’t intend on painting her up as a villain, I’ve been thinking about a specific event that happened. One time, while she was over at my house (or rather my mom and stepdad’s house, but we hung out in my room) she saw my bottle of vodka (then completely full). She asked if she could have some, begged for just a small taste, and eventually I gave in. (Disclaimer: I was older than her, and I shouldn’t have given her anything. I take full responsibility for that, and it was my fault).

She drank directly from the bottle, and washed it down with some Pepsi. The first time she only did it once, and already then she felt the need to sit down and started acting super dizzy. She said it was really strong stuff, and for the rest of the afternoon she acted like she was in her own bubble, not really registering anything I did or said.

The second time she wanted to drink (separate day), she did the same thing, except three times. all in the span of maybe 3-5 minutes. I firmly told her it was enough after the third “shot” (again, she didn’t pour it up in a shot glass, she drank directly out of the bottle. Said it was easier). What happened next, and happened pretty much immediately, made me terrified and extremely worried.

She was completely gone. She started off just giggling, saying how drunk she was, not at all reacting or replying to anything I said. It was like I wasn’t even there. Then, after maybe 2-3 minutes, she began crying, saying that “this has never happened before” and she began apologizing “I never wanted you to see me like this.” She asked me to call the home she was staying at (a special type of home for teenagers who need some extra help in their lives, typically those who suffer from NPF-diagnoses). Now, my ex hated her home, and always told me to never ever call them. But I did as told, and the personal sighed and informed me what I already knew: she wasn’t allowed to drink. Especially not on a Tuesday.

A couple of minutes later, my ex asked me if I had called her home (she was with me when I called, and even talked to the personal herself). It was like she had completely forgotten. She asked me why, and when I told her it was because she had asked me to, she cried again and started asking why she had said that.

When she received a text on her phone that the personal would soon be there to pick her up, she magically managed to stand up straight and walk like normal (she had up until this point been lying in my bed). She told me that she would try to act sober in front of my mom and stepdad, and she managed to do it perfectly. She could even walk down the stairs without any issues.

We’ve now broken up, but me and my mom have talked about this a couple of times since. She’s told me that the amount missing in the bottle is close to nothing, and that not even our dog (who is a Jack Rusell) would’ve gotten drunk from that amount. My ex also told me of parties she had been to, where she had drank until she puked, and then drank some more after that. Once, she showed me a picture of when she and a couple of friends had been drinking, and one of them had a breathalyzer. Her alcohol content was above 3‰.

While she didn’t drink often, so she likely didn’t have a super high tolerance, when she did drink she drank a lot. So she was an experienced drinker, at least. Which brings me to my question: was my ex lying/faking how drunk she got?

Worth noting is that she was on multiple medications at the time. I don’t know which, but I know she was on the same medications at the time of the party previously mentioned.

I know absolutely nothing about alcohol, I’m hoping someone who knows more can help me out!