<human>: Can you summarize the given text in a few sentences?

Earlier this week, my parents were traveling back from visiting my grandparents.  About 80 miles from home, they stopped to help a young man on the side of the road with a blown tire.  Now this isn't all too uncommon, but they were still the first to stop.  Since it was a Sunday, all of the tire shops were closed by the time they got into town, so they offered the kid a place to stay in the guest room, so he wouldn't have to spend extra money on a hotel.  They fed him dinner, took him on a hike with the family, and let him sleep in their house.  The next morning, they fed him breakfast, and my little brother let him play with his xbox while he waited for the tire shops to open.  I believe at this point we were passed what is generally considered a normal level of decency towards a complete stranger.  

The thing that really surprised my girlfriend though (and caused me to create this post), was that my parents actually helped the kid pay for the replacement tire.  My mom had told him the night before that she thought it would be around $60.  When the lowest price she could find was $102 (I say she because my mom did the price hunting, not the young man), my mom felt bad and paid the difference.  The young man then left to continue his trip, and odds are we'll never see him again.  This was pretty astounding to my girlfriend, but to me it was just the way my family (especially my mom) functions.
<bot>: My family took in a kid with a blown tire for the night, and then helped him pay to replace the tire the next morning.