Gave my best friend my old car, now she wants a share of the sale because she maintained it

My best friend moved from our hometown of Kelowna, B.C. and joined me in Calgary in Feb 2019. When she came she was gonna buy/lease a car but I still had my old car (2004 Chevy Malibu) so I offered that she use it for free to save costs. She could use it as long as she wanted and return it when she didn’t need it. She agreed to maintain it while it was in her possession.

Anyways, she’s secured a new job in Toronto and will be moving in November. I asked if she wanted to keep the car and she says no, she’ll buy one when she gets over there. So far so good. But then her boyfriend pipes up and says that since she put money into the car to maintain it she should be entitled to a share of the money from the car sale when I do go sell it.

That doesn’t sound right to me, but I wanted to ask if that sounds fair or not?

Edit:

It’s funny; I’m not even a tit for tat person, but I was thinking about it. The boyfriend runs this side hustle where he gets free furniture from foreclosed houses and sells them at 100% profit. Last month I was helping a friend move, and my friend’s roommate had left a bunch of almost-new furniture, including a huge flatscreen. I called the boyfriend to come get them, and I would never even have dreamt of asking for a cut of the money he made. I’ve always liked him, but this made me disappointed in him for sure.