I am feeling upset with my partner and his son right now that I have gone quiet on them. We were invited to spend Christmas with my sister and her family. My brother's kids were also there. I have been with my partner for close to two years now and this is the first Christmas with my family. We were invited to stay the night at my sister's so we could relax, drink and party without having to rush home. We had planned to go to my partner's mum on Boxing Day so staying over at my sister's was a good option. So come Christmas Day, we headed to my sister's, she had invited some of her friends for Christmas dinner. My sister & her husband really tried hard to make sure everyone is made to feel comfortable and welcome.
In the afternoon, my sister's friend and kids played music for us, it was great to see the kids get into it, it was fun. Then afterwards, my sister played music too from her selection on YouTube for everyone to enjoy, she then asked my partner what music he enjoys, he never really told her. She also asked my partner's son the same question but he also didn't say so she went through some artists but they just said no they didn't like those artists. But the friend's kids requested some songs which were played. Come Boxing Day, she made brunch and we left for partner's mum's place at around midday. Today, my partner and his son were telling his mum about Christmas with my sister and mentioned how they were tortured with the crap music & how only thick people listen to such ridiculous music. His son spent the whole day avoiding the other kids and after we had left my sister's, he said how they were very different in their mental state and how the other kids were too thick that he couldn't see himself socialising with them. To be honest, am upset and feel like I will never take them to my family again.
Am I overreacting?