I see my suggestions haven't gone unnoticed.

There is indeed a noticeable improvement in the last few seconds on the facial animation part. The last second gasp and acceleration in fucking intensity really sells it. The animation could be smoother, sure, but it is way better than what I would have the patience to do right now.

The finish up after that is also a nice touch, with the man picking up her corpse and finishing and then letting it slump to the side.

I can't be sure, but I imagine the complexity of this little side hobby is already starting to kick in - but if you aren't bored of this scene you can do all sorts of improvements on it: add cum effects, maybe even play with fluid physics for the blood or cum, add animation to the man in the first 50 seconds or so (I imagine this would be simpler if there weren't two separate actors and you could somehow group-animate on both, but I'm not sure), make him slap her tits or something… maybe have her grasp at the collar in the last few seconds in desperation.

Regardless of your decision, I enjoyed your second iteration of this (I assume) first project.