If she allowed herself to analyze why she would rather track Draco instead of Antonin, she would have to admit to herself that she was afraid of what she would find if she attempted to cast the tracking spell on the watch. What if it didn't work? Could she have the strength in that moment to keep going forward if it turned out that her husband didn't survive his injuries? Truthfully, it was a miracle that they'd both managed to live as long as they both had in the stress and uncertainty of their world. Someone could've easily stabbed a knife in his back years before. And she'd had enemies who wished her dead since before Harry was killed. Some even loathed her just because of the so-called dirty blood that ran through her veins. Somehow though the Dolohovs were able to keep living. She was afraid that tracking Antonin first might be disheartening.