I am filling the visa application for my in-laws. My father-in-law still working and mother-in-law is house wife. While I was filling the forms online, I got DS-156 for both to be filled. But DS-157 has come for mother-in-law only. Is this common? Should we take a hardcopy of DS-157 seperately filled and taken to interview for my father-in-law? Please help.