Complex sentence: As the job progresses, she adopts a more tender attitude toward Jessica, who discovers old Christmas house decorations in the attic, which the McFarlands used to display, and suggest she put them up again.
Split into simpler sentences: As the job progresses, she adopts a more tender attitude toward Jessie. Jessie discovers old Christmas house decorations in the attic, which the McFarlands used to display, and suggest she put them up again.