Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: hi all,

throwaway account because of a sensitive situation. 

some context: i have a serious disease that is believed to be genetic, though it isn't linked to be a single gene and can't be tested for (it's believed to be about a 10% chance of passing it on). as a result of this, my partner and i have decided to not have children.

that's why i was thrown for a loop when my sister asked me to be a sperm donor for her wife.  she explained that having a child that came from her and her wife would be really meaningful for her, and my participation is the only way that could happen. she is aware of my disease and the associated risk but does not view it as disqualifying. nonetheless, i disagreed with her assessment and so declined.

i love my sister and her wife and want them to have everything they want in the world, but i'm just not comfortable with the idea that i could be the cause of their child's pain and misery. so AITA?

refusing to be a sperm donor for my sister's wife