Maclean found out and broke with Philby .
Kim Philby and Melinda Maclean became lovers during a ski trip in 1964 , while Eleanor Philby , Philby 's American wife , was on an extended visit to the US .
Melinda Maclean found out and broke with Philby .
Kim Philby and Melinda Maclean became lovers during a ski trip in 1964 , while Eleanor Philby , Philby 's American wife , was on an extended visit to the US .