Using magic to Apparate directly to her living room was an option she initially considered. At the very least it would save her from expending so much energy in the journey. Before she removed her wand from its hiding place in her pocket and made a decision she couldn't back down from, she reconsidered. Antonin would be on the offensive if he sensed her use her wand. He would likely track her down to the very spot she was in and assume that she was there to cause trouble. There was a very real possibility that no matter how she stepped back into her husband's life she would come to a sticky, painful end, of course, but she decided that calmly walking through her front door had the best option for success.