Not telling your wife that you're making a big purchase, knowing it could upset her, will just upset her more. Who wants to spend the holidays arguing? Do the right thing and have a conversation with her about how much fun the kids had at your sister's and how you'd like to keep the good times going in your own backyard.
I'm a real people pleaser-I often prioritize the needs of others over my own and carry a constant concern for their well-being. While that can be a beautiful human superpower, my fixation on pleasing everyone sometimes leads me away from my true self.