It turned out that she wasn't mad at all, she just wants to be sure I'm not getting ripped off.

I went out and bought my parents two books I knew they'd love and two of their favorite wines. My dad was so excited when he saw the wine and he told me that it is his all time favorite wine and that he doesn't normally buy it because it's expensive, and my mom told me the wine I got for her was also her favorite wine. They were so happy and when I asked if they drank their wine, they told me they are saving it for a special occasion.