(Well, firstly Eve needs roll ride check DC 20 to dismount as free action, otherwise it is move action and so she cannot do full attack. But she can do full attack from atop a horse and get +1 to all attacks than leverage. Fel, also you do not have eschew materials so you would pick out a glowing stick or wand to cast the spell altough not doing other gestures or sound. So you should roll defensive casting if you do not move 5'ft before the casting away form werewolf. Also the spell, if targeted onto you, will also affect you. It after all haves 100'ft medium range and +10'ft radious. You can affect both wolfies whitout affecting Eve tough.)