Also in April 1918, Nicholas and Alexandra were summoned for a trial in Moscow and wanted one of their daughters to go with them. It's unknown whether it was ever intended for the Romanovs to actually reach Moscow, or whether the Ural Soviet's interception of their train was unplanned. The girls decided amongst themselves that Maria would go with their parents. Olga was too emotionally unstable to be of much help, level-headed Tatiana was needed to watch over their ill brother, and Anastasia was considered too young. The rest of the children were left behind in Tobolsk because Maria's brother Alexei was ill with a severe hemophilia attack after which he would never walk again. The four other children joined their family in Yekaterinburg several weeks later.