Damon could see that Talia was set on visiting her friend. Talia said she wanted to ensure that Olivia was alright, but what if she wasn't? What if Talia sees things that will upset her? And also… "Let's say we go to the Shadowbite pack, and their Alpha welcomes us. He might even allow Olivia to come to your Luna ceremony. What if he punishes her when she returns?"
"Will he do that?"
"It is a possibility." A strong one. Alpha of the Shadowbite pack might be helpless in front of Damon and Talia, but he will unload his pent-up resentment on the Omega in question.