Erel didn't really want to make any changes to the elf; doing it to the genie was fine, but going too far with someone others might see could hurt her. So she called out, "Lady of Darkness, accept my gift," as she thrust faster, letting herself climax, burying herself in Zyrah as she came. It was moments like this that she might wish she wasn't sterile, just for the knowledge that she would ahve that much control over someone else, though, ultimately, she enjoyed the no-risk fun.