Spoilers through Parade of Horribles
Prepotente's what-if apartment in Parade of Horribles hit me so hard, and I'm still processing months later
Miriam is only in her 40's, but she came home to take care of her parents and the farm 20 years ago. She gave up her life and her dreams in her 20s to take care of her parents. For, and she plainly states this, a sense of duty. Miriam gave up her life for parents who, at most, were in their 50s. For 20 years. I can't take that as anything other than control and manipulation on her parents part. Miriam was going to be married, she was building a life in a country far from them, and they couldn't let her go, so they played on her sense of duty and trapped her on that farm.
And in Parade we get to see the Dungeon AIs prediction of Miriam's life if she hadn't left. A beautiful New York apartment, a career doing something that she loved, got to travel the world, but she was alone. Alone and sick and sad. It's easy to imagine that the fiance who did not go to Italy with her when things were rough with her parents would not sick around during a major illness, married or not. There weren't any pictures of him in the apartment.
So Miriam is someone who is willing to drop everything and help others, but outside the Dungeon I don't think there was anyone willing to do that for her. No matter how her life went she ends up alone. And I think she loves her goat children, but they would never be enough. They weren't people and they couldn't take the place of human connection.
But Prepotente did become capable of that. Prepotente, clingy, stubborn, and sweet, would do anything for his mother. Miriam knew he would die for her, and she lose the one person in her life she knew truly loved her. Who would stick by her no matter what. And she had to give him the one thing her parents never gave her- a chance to live his life, no matter how hard and scary and sad. And I think if she had tried to save herself and Prepotente had died she would not have continued on. It is only in the Dungeon that I think she got what she truly wanted in life, and to lose it would be worse than death.
And in Parade, Prepotente can't see the whole picture of her life there, just all she lost. Even now, after she has died, Prepotente would give up everything just for the chance for his mother to be happy. As much as Miriam loved him unconditionally, Pony loved his mother just as much. There's just so much grief there.
If you could ask Miriam if she would enter the Dungeon again, knowing everything that she knows, I think she would say yes. Even if it meant dying, even if meant placing the burden of grief on Pony's shoulders, because, just for a little while, she got to have a family.