Better that he's not thinking about the fact that he simply cannot stop her as he is, because as long as he's on his little hero complex mental adventure, Magne is already on her way out after confirming the general neighborhood where the boy and his homicidal roommate were put up. She'd assured the barkeep that she just wants to talk.

The assumption is that she wants to threaten Vika into staying far away under pain of worse. She'd let that continue to be the case, at least for now.

"Can you do me a favor and stay here?" she calls on her way out, snatching her stolen coat off of its hook at the door. She doesn't wait for his answer.