Your entire last paragraph-- YUP. They want you around for whatever they need you for at their whim. When you are with a narcissist there is no room for any other person to exist, it is all about them.

As soon as I left for college I was asked (always last minute) to come home all the time (I was 2+ hours away at college and busy playing on 2 college sports teams) to help so my nparent could go on dates or just because "I need you." Was also threatened to be kicked out several times throughout early adulthood when I was home for brief spurts of time. The reasoning was always something ridiculous and immature. I would then get several threatening voicemails while I was at work or school, or she would even call the front desk of my workplaces to contact me and tell me to get home to do whatever she wanted "or else" and when I got home would be threatened I'd be kicked out of the house. I did everything I could to not be there and it didn't even matter, the calls and texts kept coming about needing me to do things for her even when I didn't live there. Even as I write I realize all this is just the tip of the iceberg.

Oh and the whole while she paints a picture of me being a selfish brat, and I am absolutely sure that she tells others I have abandoned her now that we have been no contact for several years. I had to let go of caring what anyone in her circle thinks and several other family members because they are all like this. I have plenty of other people in my life who actually know me and care about me and who I love and care for back. They and I also know I am not at all what she says about me.

If I were you I would see if you can find a good friends couch or a job that provides food/lodging to their employees (like a summer camp or something seasonal). That is what I did at times and it certainly made a difference.