29 Acacia Avenue

29 Acacia Avenue is a play by Denis and Mabel Constanduros. Its 1945 British comedy-drama film adaptation, directed by Henry Cass, was released in the U.S. as The Facts of Love.
Premise.
Peter Robinson falls in love with the naïve country girl Fay and the worldly, wealthy and already-married Joan, and lives with them both (and Joan's husband) at his parents' house. However, one day Peter's parents unexpectedly return from holiday, and all hell breaks loose.
Critical reception.
Allmovie wrote, "one of the few low-budget British programmers to enjoy a reasonably widespread American release...The film weaves three separate romantic subplots into an entertaining unified whole"; though Sky Movies called the film "one wartime West End success that didn't transfer too well to screen, ending up embarrassingly stagey"; but the "Radio Times" thought that although the film "fails to fully disguise its theatrical origins...it nevertheless makes for pleasant period entertainment, with particularly likeable performances from British veterans Gordon Harker and Betty Balfour as the parents."