I did some side work that applied to work. Something that interested me, but on my own free time. I've moved on to other hobby projects, but now those side pro

I did some side work that applied to work. Something that interested me, but on my own free time. I've moved on to other hobby projects, but now those side projects have become a big deal at work. Now I'm getting assigned my usual work plus the task of bringing up this side project. I refuse to give them my personal time so there are never enough hours to get anything beyond my regular work (and what are considered the highest priority) done. It's definitely having a drain on me and I have to keep reminding myself its their problem how they prioritize things. I won't hand them more of my personal time. Occasionally I get to point this out as I'm pulled into meetings where the update is no update, which amuses me.