 According to modern historians Isabeau stayed in close proximity to the children during their childhood , had them travel with her , bought them gifts , wrote letters , bought devotional texts , and arranged for her daughters to be educated . She resisted separation and reacted against having her sons sent to other households to live ( as was the custom at the time ) . Pintoin records she was dismayed at the marriage contract that stipulated her third surviving son , John , be sent to live in Hainaut . She maintained relationships with her daughters after their marriages , writing letters to them frequently . She sent them out of Paris during an outbreak of plague , staying behind herself with the youngest infant , John , too young to travel . The Celestines allowed " whenever and as often as she liked , she and her could enter the monastery and church ... their vineyards and gardens , both for devotion and for entertainment and pleasure of herself and her children . " 
