So, here's what happened in a fanfiction series of mine some time ago. Angelus killed Lilah and launched an aggravated assault on Wes. On the point of death, Dru showed up and turned him on his own request. The two of them bonded, given Wes' steadily darkening character over the course of Angel. They also help to free a rather talented teenage darkmage from her abusive father. And the bond with this teenage girl (Samantha Dykstra, aka Hekate) becomes intensely strong, but not in a slashy way- more of a mother/daughter one. On some level, isn't this something that Dru would want? Something more substantial than Miss Emily? A flesh and blood daughter or child of her own? All right, so the kid is evil and twisted by her own bitter experiences, but not enough to prevent Dru and her becoming a powerful team.