AITAH for calling this out?

My girlfriend 28, who lives with her mom and step dad, sleeps naked sometimes and have the door open. She told me that sometimes the AC doesn't come through the vent and doesn't care enough to fix it. I've slept in her room and I can feel the AC coming through. You can also see her bed when the door's open from her step dads room, since they're only few feet apart & across from one another.

She would tell me that she's a light sleeper and she would know if there are weird things happening (as if what she's doing naked with the door open wasn't weird and gross to begin with). But that's also not true. Because I've gotten up from sleeping next to her to use the bathroom and come back, and she was still snoring, unmoved. She would get so aggressive, defensive and call me controlling for asking her to close her door if she decides to sleep naked. Mind you, this door doesn't even have locking mechanism. AITAH for calling this out and thinks it's absolutely weird & gross.