These are some of the activities and places my mom and I have done in the past and have absolutely loved! Most mother, daughter vacations need a cute hotel where you can relax in at the end of the day. My recommendation would be the Pine Ridge Inn, but there are plenty of other cute hotels in Bend to choose from!
My favorite activities to do with my mom in Bend are paddle boarding on Elk Lake, hiking, and enjoying the delicious food this town has to offer. The other activities mentioned are a fun combination of in town shopping and dining, along with outdoor activities. This will help keep you both on your toes as you switch from various activities and will allow for plenty of bonding time!