My aunt thinks my mom is a pushover?

My mom usually lets me and my brother have whatever we want, but always at discounted prices. When we went to visit my aunt in Colorado last month, my mom bought me a pair of Adidas slides that were on sale for $10 and a fleece coat from the brand Comlumbia for $19.98 and my aunt seemed to get angry over this. My brother and me know that we're spoiled, but the thing is my aunt spends more money on her kids than my mom spends on us. Also, my mom usually only buys us expensive brands (clearance priced), because we don't want to look like crap and even though my aunt spends more on her kids, she usually only buys them things from Wal-Mart and other stores like that. I'm guessing that maybe my aunt is jealous, but I'm not sure, because my brother told me and my mom that my aunt said that she'll buy her kids things and then them that they're spoiled. If she's going to treat her kids like crap over something she bought them, then why does she even buy them anything? I'm glad my mom doesn't say anything that to us. In my opinion, telling your kid that they're spoiled after buying them something is kind of b*tchy. I don't think my mom is a pushover at all. I just think she buys us stuff because she loves us.