The Remarkable Mr. Pennypacker (film)

The Remarkable Mr. Pennypacker is a 1959 film starring Clifton Webb and Dorothy McGuire directed by Henry Levin. The plot revolves around a turn of the century Pennsylvania businessman Webb that has two families, one in Philadelphia and one in Harrisburg. Naturally at some point his ruse is undone and he struggles to find a way to maintain the status quo.

Source: Wikipedia