I already said in my comment i accept she bumbed into Trent accidently, there's even evidence of that. But she didn't thank him without having ulterior reasons... she could've thanked him way before in the game, yet she choose to do so right after the MC raised her doubts about Tybalts.
Anyways, i think having dialogue proof is better than trying to force my point with not much evidence so here:
View attachment 3193040
View attachment 3193041
View attachment 3193042
This dialogue with MC at the barbecue clearly shows that Jill asked Trent about what Tybalt said on purpose. She didn't thank him, she wanted to fish for the truth and that's the reason she even talked to Trent to begin with.
But she bumped into him, this i accept. She maybe didn't seek him on purpose but she did fish for info. She's not that same naive girl from before, you guys are taking away too much credit from her.