Ive already explained it. Its how game thinks youre on poly way with Halsin because Drows unlocks it ( If you have high relation with him ). Plus if you dont bring halsin it goes 2 on 2. Means youre already spicing on things. For me Halsin never came there unless i wanted him to. And its perfectly normal hed want something like that if you have high approval with both of them since hes the open one. Game thinks youre okay to share SH with him and she goes along the way.