Oh, definitely. Hilgya's brand of Evil is the "I'll do anything to get what I want, and I'll be petty about it." She's ok with the idea of killing everyone in her clan/destroying their lives because, in her mind, it's fine to do horrible things if it makes her happy in the moment. But she still has goals she pursues, it's not wanton evil with no logic behind it, even if twisted.

Xykon is the guy who'll toss you in a pool of boiling blood while he strangles your wife because he thinks it's funny to see your horrified face while you drown, and he happened to be bored. Different types of Evil, but still evil.

I think Hilgya would be ok with killing a baby if it meant furthering her goals, and has long as she had no emotional ties with the baby, but she would take no particular pleasure in this.