My partner and I have been together 6 years now. We met in uni. My parents met my partner when we were just friends and were really supportive of our relationship when we moved in together an hour and a half away from them when we (coincidentally!) both got our first jobs out of uni in the same town!
Since then 4 years ago, we have bought our own home, got engaged and had our beautiful baby who is now 5 months old, and from my point of view, my partner and family have always got on laughing, joking and talking.
Last night my mother and I were discussing my brother and his horrible girlfriend and I said "I hope you didn't talk about me and Dale like this haha!" and she replied "well..." 
I then said "I hope you don't think I've made the wrong choice with him, especially since our relationship has gone so far" and she said "well I do think he can be a bit controlling; but then there are two sides to every story and I'm not there to see it and you have been better at standing up for yourself."
It's been playing on my mind and I can't seem to stop it. I thought my partner and I had a good relationship - we are happy (though he works a lot, and we wish we could spend more time together!) and I think we both work together to get jobs done etc.
Should I ask my mother more about it, or try to forget about it and move on? I don't want to mention it to my partner as I thought he and my family had a good relationship and I don't want to ruin that.
What would you do? TIA