Should I (23f) have my partner’s (34m) child and starting an unconventional kind of family?

Tl;dr my partner of a few months and I are pregnant and he sometimes mentions incorporating me into a sister wife situation in a cult he is hoping to start and others making me believe I am his one and only and that he would move anywhere with me to start our family together.

My partner and I currently live on a piece of property in the country together. We get along well a lot of the time and I enjoy his company, however, I am recently pregnant, and I have to be more realistic about the red flags within our relationship that could very well effect the well being of our child. We have a good deal of land to use as we wish, and he wants to bring groups of friends and family to live intentionally together. Yes, a cult… Lol. Well, there have been successful intentional communities throughout history, and I do believe that with the right people it could be awesome. I would happily live in an intentional community, my problem is that I don’t think my partner has any interest in me as his counterpart but more as the mother of his successor, and only wants to commit to me in the interest of our child.

When he found out I was pregnant, he swore we would get married and I would have the family I have always wanted, while just the day before, he told me he was not in love with me and did not want to be “emotionally tethered” to me anymore. Since then, he has sworn we are monogamous and would be happy to leave the property and start a life closer to our families and the city, but also says strange things like “it will be your (my) choice whether or not I want to share my husband (him) with anyone else” and that he doesn’t want to be the emotional pillars for one another as it could get in the way of his vision for the cult.

I am honestly happy to be pregnant but scared current circumstances will not be conducive to the wellbeing of my child. My partner could be worse, he is smart, dependable, and generally easy to get along with, but I have no idea if these are the right circumstances to raise a child under. I hate that he lies to me and that I genuinely have no idea whether we will be committed or not once more people are here. Let’s say we are not monogamous and we both develop other partnerships ethically. Many parents in monogamous partnerships end up failing their children, but who knows maybe a throuple or open relationship could be more ideal. I also know his romantic love for me does not go beyond the fact that I am carrying his child and I don’t even know that I have a problem with that. Let’s say we are in loveless relationship where we are simply there to be the best of parents, with no other personal attachments to each other. Is that such a bad thing? I can’t decide if I am overcoming the shortcomings of romantic monogamous love that we practice in the west, or if I am just so weird and broken that I am open to being the sister wife of a sodomite megalomaniac.

I have an abortion scheduled Monday which I have not told him about yet and I am torn on my decision. Is this a worthy basis for giving up my baby? Will any relationship with this man truly satisfy me or provide better circumstances for raising a child? Thank u for reading this absolute mess about my life.