The Kiss (1929)
Irene is unhappily married to an older businessman, but very much in love with a handsome young lawyer. He doesn't want to add to her unhappiness by ruining her marriage; she is terrified of her husband's jealousy and anger. They decide to stop seeing each other, and she bides her time with Pierre, a young friend of the family who walks their dogs and is in puppy love with Irene. When Pierre is about to leave for college, he begs her for a goodbye kiss. She agrees, and who should walk in while it is happening, but her ailing and financially distraught husband...