After a decade apart, a guilt-ridden Irish banker who is terminally ill must reveal to her American baseball star/ex-boyfriend that her preteen daughter is actually his, so she can die in peace.

Hi carllord,
Sounds more like a character arc than a logline to me. You have an internal development of the hero laid out here, but I am missing the main obstacle keeping the hero from achieving his goal. Since she’s terminally ill, she should have a fairly easy time admitting this, or who else will take care of her daughter when she’s gone? While the irony of the situation sounds great, I don’t see where the main opposition is coming from, either internally or externally. Certainly no match against her impending death and leaving her little girl to fend for herself…