Conditionally Required Fields

This is just a question about whether or not something can be done in cformsII. I have a form that has fields for entering information about two people. For the first person all info is required (name, email, address etc). Entering a second person is optional, however, if a name is entered for the second person then we would want all of the other info be required. I obviously cant’t just make these be required fields since they are only conditionally required. I can think of complicated ways to do this using multiple forms (i.e. a main form and then separate forms for each person) but ideally I was wondering if there was any existing functionality that might say that field Y is required only if data has been entered in field X. I’m pretty sure this isn’t possible but I thought I would ask. I would also welcome any thoughts about work arounds. Thanks much.