Dragoncrest Cliffs ask yourself

While Opalia was keen to evade their watchful parents, she seemed to have dismissed the curiosity of her brother. Dacio observed her quietly and from a comfortable distance, half-hidden among the longer grasses just beyond the den's mouth and nosing at rogue stalks.

His relationship with the girls was mostly rocky, as Dacio was often too bold for his own good. He was always all up in their business, poking his nose where he wasn't wanted and never learning his lesson. Despite knowing that pushing Opalia and Sequoia too far would result in a squabble, Dacio continued to venture into dangerous territory. 

He crept out of hiding when his blonde litter-mate flopped on the ground, and tip-toed toward her with a careful stride. When the opportunity presented itself, Dacio stepped directly over her and dropped like a dead weight on top of her with a satisfied "hmph!.