Many Texas households include family members who are U.S. citizens who happen to be married to spouses who are not. The federal government often calls such marriages into question if it has reason to suspect that a relationship is fraudulent and that two people have gotten married simply to help one of them obtain permanent resident legal status. A non-citizen marrying a citizen, however, doesn't necessarily mean that person will gain green card privileges.
Many Texas immigrants hope to obtain a permanent resident legal status in the United States. Those who have married U.S. citizens will, at some point, attend a green card/marriage interview. Answering questions during an official immigration interview can be quite stressful, and not performing well can ultimately place one's status at risk.