I understand that. But when somebody your own age is dying horribly and you've got their kids, even temporarily, the situation is too fraught to just shrug off the old connection. Maybe it's because I've adopted older children and have lived through their grief at loss, but unless Nicola is staggeringly unempathetic, this situation is very very intense. I think it would make her sit back and reconsider her own junior self and her inability to forgive Lois back then. The girls' impending loss of their mother would also reawken in her memories of her own losses, particularly (I expect) ones from her childhood, like Jon. And I think that when you are a mother yourself, you feel a kind of empathetic agony with a dying mother at the thought of leaving your children behind if you were to die yourself. So Nicola would surely feel that as well. I think she'd feel just completely terrible for Lois on a lot of uncomfortable levels, and she'd hate feeling that way, and would have to figure out how she ought to behave.

I mean, if she'd simply run into Lois on the street she'd have shrugged her off, but what's interesting about the situation you've set up is that she shouldn't be able to do what she'd naturally want to do. If that makes sense.