AITAH for refusing to be an egg donor for my brother even though I promised years ago?

A Redditor shares her dilemma regarding her promise to donate her eggs to her brother and his ex-husband, a couple she once adored. After agreeing to be a donor years ago, her brother’s infidelity and quick marriage to the contractor who worked on their shared project shattered her trust.
Now that her brother wants to move forward with starting a family, she grapples with whether to honor her past commitment or prioritize her loyalty to her brother’s ex, Martin, who is still struggling with the aftermath of their divorce. Read the full story below:
‘AITAH for refusing to be an egg donor for my brother even though I promised years ago?’
Here’s the comments of Reddit users:
Do you think the user should honor her promise to be an egg donor for her brother, or is she justified in reevaluating her commitment given the circumstances? How would you approach a situation where family ties clash with personal morals and loyalty? Share your thoughts below!