Vienna was the best thing to ever happen to him, even if it likely did not make his “relationship” with her brother any better or easier. Still, Sumayl wasn't worried about Jace. The ebony Beta was a big boy, despite how he acted around Sumayl, and could take care of himself. After all, it wasn't like he was courting Jace as well. While they were something of a package deal, Sumayl was assuming that, that wasn't part of the deal. They were not adjoined twins, after all, and the Ostrega believed that they did not have to share everything with one another.
Sumayl felt no need in being redundant by re-telling her that he would support her, nevertheless. Whatever she decided to do he was behind her. He had already stated it once and he intended to back up his words with actions. Sumayl was quiet when Vienna spoke about trying the Plateau to find a healer mentor, his handsome face holding his contemplation. He was seized by a sudden knot of anxiety, despite that he understood that Vienna was a seasoned adventurer and would likely be quite alright making the trip on her own. Even so, he did not like the idea of her going alone, or even with anyone but himself (because he didn't trust anyone else to protect her?). It was not that he thought her incapable because he knew first hand that, that wasn't the case. It was because he loved her, and the consideration that if something happened to her was too painful for him to even want to consider it, despite that it nagged at him as a persistent worry. For a moment Sumayl struggled, not wanting to be that guy — the overbearingly protective boyfriend. She already had one of those, though it came in the former of her younger brother. “Do you plan to make the trip alone? I'll go with you, if you'd like.” He offered, instead, in an attempt to dilute his worry some so it was not so blatantly obvious. Not that Sumayl had an issue with outright telling her that he was concerned and did not want her to go alone but at the same time he did not wish to upset her with his concern.
Clearly, Sumayl Ostrega was not so good at this whole 'spouse' thing, after all.