Am I a cuckold?

I'm wondering if this is a cuckold situation? I hope I've come to the right place.

I'll say right off the bat that I'm 20 years old, I don't have a wife, I don't even have a girlfriend, and I live alone with my mom. My mom is divorced from my dad; they got divorced when I was 16. They argued a lot; he was aggressive toward both me and her. After the divorce, he would often show up at our house. He'd apologize and say he'd changed, that he loved my mom, and so on. My mom always brushed him off. The day before yesterday, he came by again; I started arguing with him and tried to kick him out of the yard—I felt like he was about to hit me... but since it was already late in the evening, my mom told me to let it go, go to bed, and that she'd handle it. I listened to her, certain that, as always, she'd kick him out...

In the middle of the night, I woke up to the sound of my mom's moans coming through the wall. At first I thought she was masturbating, but after a moment I also heard a man's groans. I pressed my ear against the wall to hear better, and well...

Between the moans, I heard my mother saying that she loved him, that she'd always be his wife, and to fuck her harder... Oh, and of course it was my father; he was telling her that he knew she'd been missing him and that she had to obediently give him her pussy to fuck again. And "I'm yours, only yours" from my mom...

And listening to that, I got a hard-on and jerked off while thinking about my parents. But does that make me a cuckold? Since I actually felt betrayed, he almost hit me, and my mom let him stick his dick inside her that very same night? And since, despite all that, listening to them and imagining them turned me on?