Exodus 20:12 ~ "Honor your father and your mother, that your days may be long in the land which the Lord your God gives you."
Not applicable in a case of marriage. Terri's husband has no biblical mandate for honoring his relatives-in-law.
If the first passage is true then her parents would also be his parents making the second passage applicable to him.
If they are truly made one flesh then shouldn't they have to honor each others parents as their own?