Did my roommate [F] masturbate after hearing me [F] fuck my boyfriend?

Hi everyone. Long time lurker here. This is my first post here so please play nice. Content warning: small references to daddy dom/sub, degradation dynamic, breeding
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At my apartment, the walls aren’t paper thin. But, having the bedroom next to my roommate means we can hear a lot of each other sometimes. Often, I hear her bed squeak as she tosses and turns during a bad dream. But sometimes I hear her bed squeak a whole lot. And my perverted mind starts to wonder if there’s more to it.
It can sound like she’s humping the fuck out of her bed. I know the sound very well because I’m a woman who humps the fuck out of my bed when I masturbate.
Now I’ve spent more time than I’d like to admit thinking of whether my roommate is masturbating or if my depraved mind is making it up. What confuses me most is her timing. If she’s really asleep why does she answer my texts while her bed is groaning? The sounds I hear from behind the wall just give me more questions.