She bought tickets to see her favorite artists 6 months ago, but 2 hours beforehand, her sister called demanding she babysit her 5 and 3-year-old niece and nephews; prioritizing her concert, she refused
Both sisters had a night of festivities planned, with a concert and a wedding to attend, but the mother’s lack of planning doesn’t mean that her sister should sacrifice her evening, especially if she wasn’t even willing to pay her back for the tickets.