Maybe when the kids are grown, she could tell them - as a moral lesson.
But not while they’re young. God has forgiven her so leave well enough alone.
If the children question her directly about it, then she could deal with it.
People hang out their dirty laundry too much, IMO. Everyone has things in their past of which they are ashamed. Ask God for forgiveness (and if there is aggrieved party, ask them for forgiveness), then move on.
She can tell them when they are ADULTS.
What kind of friggin’ sicko does that to her little kids????
Oh, the same one that didn’t want to deal with a child. She dumped that. Now she can dump her guild on to her children.
Disgusting is all I can think of.