Mom's Christmas Reward Vouchers

While we were out shopping for Christmas, my mom set her heart on a massage chair that cost over ten thousand dollars and insisted I buy it for her. When it was time to pay, she handed me a stack of supermarket reward vouchers, saying, "There are plenty of reward points; spend all you like." I checked and found the vouchers were only enough to redeem two packs of toilet paper, yet I quietly covered the cost and bought the massage chair anyway. Then, my younger sister, Cheryl Quest, made snide remarks in the family group chat. Cheryl: [Celeste Quest must have hoarded a ton of points. Every time Mom gave her a stack of reward vouchers, she barely redeemed anything.] Cheryl: [She definitely pocketed the rest; talk about milking everything she can.] My mom did not say a word to defend me, seemingly convinced that I had indeed pocketed her "massive stash of reward points". She would even go around showing off to relatives. "My daughter is so capable; I got all this by redeeming reward points and didn't spend a dime." Over the years, I had chipped in hundreds of thousands of dollars to help them buy fridges, TVs, washing machines, and all sorts of appliances. However, I ended up with a reputation of having pocketed a "massive stash of reward points". Thus, when my mom handed me another stack of expired reward vouchers, asking me to help redeem them for cash and distribute them as gifts during Christmas, I took the vouchers and proceeded to tuck them into festive envelopes.