The thing is, even if everything there is true, the boys have other family. What about grandparents, aunts/uncles, cousins, other significant people in their lives from when they were younger? She can't erase all that and it would be healthier to provide time with family so that the boys have the information they need. Supervision is available if needed. She should think forward to the possibility that the boys will want to know their other family and gravitate to them. The more they are kept away and later maybe see this as an injustice, the stronger that urge is likely to be. For Seb, this is potentially there on the horizon.