Not to worry, nothing would go wrong. Illyana had done this plenty of times - there were other aspects of her magic that she was still practicing, but teleportation was one thing she knew well; this portal would lead right to the Tower lobby, by the Starbucks. "You are welcome - looking forward to the Instagram place," she smiled, accent caressing her words. "Message me if you want."
She was only a hop, skip, and a jump away on the Stark network - and the Tower was very large but it would be nice to have someone else she knew there. Besides the cats.
Who she should probably check on now, come to think of it.