He gave her KANGAROOS!! At first I wasn't sure if they were actual pets for her to keep, or just got to play with them for the day, but the real reason is so much sweeter than I imagined. Luke's wife Caroline lost her young niece earlier this year and has started a farm of rescue animals in her honor! It's called Brett's Barn named after Sadie Brett, and the kangaroos are the latest addition! See Caroline's explanation of Brett's Barn by scrolling to the end.
Here's the story behind Brett's Barn: