A Bit of Singing and Dancing 1982 one on netflix

Freed at last by death from tyranny of an elderly, querulous mother, Esme Fanshaw is persuaded to take a man, Amos Curry, into her house as a paying guest. At first wary of him, Esme becomes increasingly fond of this dapper little man with his mysterious summer occupation. When she finally learns the nature of this occupation she is at first shocked then sympathetic.