My cousin wants to surprise my mother with the brother she has not spoken to in twelve years

My mother retires next month after thirty-four years at the same public library. We are having a dinner for her at a local restaurant, and my cousin thinks the evening would be ‘the perfect chance to heal the family.’

His plan is to invite my mother’s older brother without telling her.

Mum and my uncle have not spoken in twelve years. The break happened after my grandmother’s funeral. I know there were arguments about money and things said about my dad, but Mum has never given me every detail. She has been consistent about one point: she does not want contact. My uncle has sent two cards over the years. She returned one unopened and ignored the other.

My cousin is my uncle’s son. He believes both of them are stubborn and that time has made the original fight smaller. He says they are getting older and will regret wasting more years. He also says a public dinner is safest because nobody will make a scene.

That is exactly why I think it is unfair. The room, the speeches and her coworkers would pressure Mum to be gracious while somebody else decides whether she is ready. Her retirement celebration would become a reunion she did not request.

I told my cousin not to invite him. He said I am taking sides in a conflict I do not understand. That is partly true. I do not know who was right twelve years ago. I do know whose event this is.

Now he has become vague. He says he will ‘respect the family’ but will not promise that his dad will not hear about the dinner. The restaurant needs a final headcount next week. I am considering telling Mum about the plan so she can decide whether to change the guest list or venue. My sister thinks that will contaminate the whole celebration with anxiety over something that may not happen. She wants us to tell the cousin in writing that our uncle will be asked to leave, then proceed normally.

I hate the possibility of Mum spending her last weeks at work worrying about an ambush. I hate even more the possibility that she walks into one because we protected her from the warning.

Should I tell her now? Is there any respectful way for my cousin to offer reconciliation, or does involving the estranged person’s child make the offer pressure by definition?