WIBTAH if I not let my roommate have my bike?
So for context we're both Dutch and biking culture here is big so everyone has their own bike for travel. My bike is a good quality second hand one I bought at a bike shop. My roommate has a bike she got from her brother that he outgrew so she ended up getting it as a hand-me-down.
One day my roommate came up with the idea of each of us trying eachother's bikes out to see how it would be like. I never fully agreed but since my bike was a dutch style bike and hers a regular athletic bike, and she had issues with her lower back I thought I would do her a favour and let her try mine out so she could decide to get a better one. So I agreed to lend it for a week.
One week later, I went to grab my bike to go to the train station and I see that my roomie had already taken it to go to work. I didnt think much of it and thought that maybe I should give her more time so she can look for a new bike. But its been a few months now and I dont really see an effort coming from her to look for a new bike. And I feel like she's planned this from the start, considering that she act like she owns my bike now, and that it was "as if the other's bike was meant to be for oneself" and that she said her bike was 2 years old (eventhough it belonged to her brother first??).
I feel like she's trying to manipulate me into swapping the bikes so she can get rid of hers and have a newer one, but at the same time I feel like she does deserve a newer bike since she's done so much for me and she feels like an aunt to me in a way. She also has an intellectual disability and doesnt have a lot of money either (not that I myself do either but I'm financially better off than her). I'm conflicted and I don't know what to so. So, WIBTAH?