 Additionally , according to <unk> , <unk> did not divorce her husband until after <unk> 's death , making it unlikely that the already married <unk> would be pressing <unk> for marriage . Some modern historians <unk> that <unk> 's execution of <unk> was prompted by her plotting to set <unk> <unk> on the throne . According to <unk> , <unk> tried to kill his mother through a <unk> planned by his <unk> tutor <unk> . Instead , it took the life of <unk> 's friend , <unk> <unk> . When <unk> survived , he had her executed by <unk> and framed it as a suicide . The incident is also recorded by <unk> . 
