Oh lol. I thought she had no idea and ended up giving you the side eye when the weird stuff was on.
I watch fairly ' adult ' themed English movies with my mother as long as the sex scenes aren't too graphic or too long. But I can't imagine watching animal with her at the theater. The obvious reasons aside ,her Hindi is pretty bad and they usually don't show subs at theaters here. Years ago when we were watching Laaga Chunari Mein Daag, half way into the movie she yells ( grandpa was hard of hearing so all of us have a very loud speaking voice ). " OMG ! They're PROSTITUTES !!! " " Is the mother one too ? ". She kept asking me if Kunal and Abhishek had a 'motive '.
So there was no question of explaining Animal to her. She'd have pukka assumed Rashmika was the prostitute in this one when they started having sex in front of the maid. And she's a hygiene freak so that underwear swap scene would have had her ranting.

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