The Family Way(1966)

Young newlyweds Arthur and Jenny Fitton want nothing more than to get their marriage started on the right foot. But before they can depart for their honeymoon in Spain, they have to spend their first night together at the home of Arthur's parents. The couple are prevented from having any intimacy, but it only gets worse. They find out that their trip to Spain is canceled, which sets the tone for a rocky few weeks.