Hybrid vampire slayer mates

Isabella is the daughter of the slayer and a vampire. Who after her seventeenth birthday wants to travel on the road to find her mates and her own destiny. What happens when her family comes to visit. And their old enemies come along to harm her will the protection of her mates and family save her or not. Crossovers with btvs/thevampirediaries/twilight buffy/spike, J/b/d