I take the bus to go to work and come back home, but there is no bus to catch when I finish my shift on Saturdays and Sundays. One of my colleagues offered me a ride back once on the weekend, and I happily accepted it. She did this few more times, but I think since then it became an obligation for her.
I am more than happy to get an Uber and do not feel guilty about taking advantage of the situation, but I also do not want to be rude or make her think she did something wrong. What should I tell her?
More details: Yesterday, she offered to give me a ride as it was raining. I thanked her and told her I do not want to bother her more than this. This morning I was sitting in the lunch room after punching out, she came in and told me to hurry up before the morning lock down, so I misunderstood this for an invitation for a ride. So, I hurried up and told her “I do not want to bother her if she is busy.” She was shocked and said, "do you mean you need a ride?". I was embarrassed. However, she was kind enough to give me a lift and told me it was an open invitation, and she forgot that there are no buses today.