Hope this is okay, I'm making the sweeping (but hopefully not unjustified) assumption that she'd have been allowed to stay in GH during her visit.
Where Trisden's litter would be born had been decided a full moon's cycle before she'd even conceived, because the Lyall matriarch reviled last-minute planning and preferred to have all her eggs in a row... particularly if they involved her actual eggs. The notion of having children, her own, and not just helping to raise yet another litter of her siblings felt strange enough to be almost difficult to believe.
Hers, really hers. It felt right, in a deep, satisfying kind of way, to know that she was finally going to be assuming the role she'd been craving for years. The Reach had been under her rule ever since her parents had left for the last time, and though the pack had been aware it was unlikely they would ever resume leadership, the fact that Borden was still alive out there, somewhere, had illegitimated Trisden's authority. She had still just been a placeholder, in her own eyes even if everyone else had accepted her rank.
Now her father was dead, and while she mourned his loss as a daughter, she celebrated the opportunity it presented to really come into her own as a leader.
Moving through the forest of her childhood, finding the nostalgia sickly sweet and vaguely unpleasant no matter how many days she spent here, Trisden reflected on what it may have been like to bear her offspring here, but that alternate universe was so divergent that would she even have been the same person? She tried to imagine still seeing these trees as home, the smell of cedarwood, but it was so alien now. To her satisfaction, pregnancy had been treating the Lyall very well indeed, which was all the better; she had been thinking about her journey back from the very day she'd arrived, only living half in Grizzly Hollow, for the other half was constantly ruminating on matters in Renegade's Reach and her absence from them. It made her feel so powerless to be away from it, but this had been a good choice. If nothing else, she had achieved a satisfying closure from being here one last time.
The sound of someone rustling on the other side of the shrubbery she was walking past caught her attention. She did not hesitate long before moving towards it, bouncing herself up so that she could stand on her back-legs with her front arms and chest resting on the top of the hedge, giving her the opportunity to see who was on the other side. Fortunately, it wasn't a particularly tall hedge, and she looked down on the woman on the other side - the current female leader of the pack, if she wasn't mistaken! And a total stranger, how about that. What a fine testament to Lyall power was this Grizzly Hollow.
"Good day," she said, with somewhat smug, blasé smile, as though it were totally normal for wolves to just appear on top of foliage.