Did Sil enjoy Arden?

I don't think she was really looking to "enjoy". She was just following her instinct to mate and he was the able bodied man available to her.

Believe me, nothing is trivial. - Eric Draven, The Crow

I sure would!

She looked to be experimenting. I mean why would she be bored. She's the one on top controlling everything. And all we sa was her head bouncing for a few seconds and even at that her pacing seemed to be off beat. She didn't seem to know what she was doing. Almost oh I don't know like it was her first time.

She didn't give a damn about a funny boy like him. She was just using him to sire her offspring so she would have killed him anyway even if he didn't realize who he was sleeping with. However, I did feel sorry for him when I realized before his death at her hands that he was never successful in dating, and I personally believe that he should have told any woman (on and off screen like the latter was depicted) who either wasn't interested in him romantically or already had a partner that he wished he was in a relationship like they were. Whatever their responses were might have been different but at least he would have been able to let his saddening feelings out