The family doesn’t end with the couple and their children: it extends like a vast network of love that includes the in-laws. The Catechism of the Catholic Church (nos. 2197-2257) and Pope Francis’ Apostolic Exhortation  Amoris Laetitia  remind us that honoring our parents (Exodus 20:12) also extends to those who gave life to our spouse. They are not “the others,” they are part of the “extended family” (Amoris Laetitia, 187-198), where mutual respect, sensitivity, and the legitimate autonomy of marriage must coexist harmoniously. Treating them well is not optional: it is a path to daily holiness that brings a promised blessing: “that it may go well with you and that you may enjoy long life on the earth” (Ephesians 6:2-3).

The commandment that stretches: honoring includes in-laws

The fourth commandment doesn’t stop at biological parents. Catholic tradition teaches that honor, respect, and gratitude extend to in-laws. Pope Francis, in his catechesis, invites daughters-in-law and sons-in-law to cherish this relationship, “even though they are sometimes special,” reminding us that they gave our husband or wife motherhood/fatherhood.  Amoris Laetitia  states this clearly: “In this extended family there are also the father-in-law, the mother-in-law, and all the relatives of the spouse. Special sensitivity is required so as not to wound the intimacy of the couple” (n. 198). Honoring them means recognizing their value, being grateful for the gift of your spouse, and treating them with the same affection that Jesus showed to Peter’s mother-in-law when he healed her (Mk 1:30-31).

But be warned: honoring is not synonymous with blind obedience or allowing interference that undermines the autonomy of marriage. Pope Francis himself and the Catechism emphasize that, upon marriage, a new unity is formed (“he shall leave his father and his mother and be joined to his wife,” Gen 2:24). Healthy boundaries, set with charity and dialogue, are an act of justice and love for the sacrament of marriage itself.

Stories that inspire

Think of Saint Monica, who patiently endured her pagan and difficult husband… imagine what she would have done with a mother-in-law! Or Saint Jane Frances de Chantal, who faced a difficult father-in-law after becoming a widow, but responded with meekness and prayer, transforming tensions into a path to holiness. And what about Ruth in the Old Testament (Ruth 1:16-17), a Catholic model of loyalty to her mother-in-law Naomi: “Your people will be my people, and your God my God.” She certainly knew how to treat a mother-in-law! She didn’t complain; she was supportive, caring, and ended up being the great-grandmother of King David and an ancestor of Jesus.

In real life, a couple I know decided to apply the “Ruth method”: every month they invite their in-laws over for lunch, but first they pray a decade of the rosary together, asking for peace. At first it was difficult (there were silences longer than Advent!), but over time they became the most doted-on grandparents… and the daughter-in-law the most “saintly” daughter-in-law in the neighborhood. Humor helped: when the mother-in-law criticized the soup, the son-in-law would reply with a smile: “Mom-in-law, if Jesus multiplied loaves and fishes, surely he can multiply patience at this table.” Everyone laughed, and the tension dissolved.

Practical tips

• Daily gratitude : Thank God every day for your in-laws… even if it’s just because without them you wouldn’t have your husband/wife. A simple “thank you for raising this person I love” clears up many misunderstandings.
• Small gestures make a big difference : Call, send a message, bring flowers or a treat. St. Paul says, “Love one another deeply” (Romans 12:10). A shared coffee is worth more than a thousand arguments.
• Setting boundaries with a smile : If there’s interference, calmly say, “We love you very much and value your opinion, but we made this decision as a couple.” Charity + clarity = family peace.
• Catholic humor : When your mother-in-law says, “In my day, we did it this way,” reply, “And in mine, we also prayed the rosary so that everything would go well!” Laughing together heals more than arguing.
• Prayer together : Invite them to Mass or the family rosary. Nothing unites more than putting Jesus at the center.

Treating your in-laws well isn’t a sign of weakness, it’s everyday heroism. It’s living the Gospel at the dinner table, on the phone, and during noisy Christmas celebrations. When you do it with deep love, playful patience, and constructive faith, you’re not just sanctifying your marriage: you’re building a little piece of Heaven on earth… and they’ll even end up saying you’re “the best son-in-law/daughter-in-law in the world”! May the Virgin Mary, the best “mother-in-law” in the universe (the mother-in-law of us all!), help you love them as she loves each of her children.