PRAYER TO ST. MONICA,
PATRON SAINT OF MOTHERS, ESP. OF THOSE WITH ALCOHOLIC, ABUSIVE AND UNFAITHFUL HUSBANDS, AND DIFFICULT CHILDREN.

Exemplary Mother of the Great Augustine,
You perseveringly pursued your wayward son
Not with threats but with prayerful cries to heaven.
Intercede for all mothers in our day
So that they may learn to draw their children to God.
Teach them how to remain close to their children,
Even the prodigal sons and daughters who have sadly gone astray.
Dear St Monica, troubled wife and mother,
many sorrows pierced your heart during your lifetime.
Yet, you never despaired or lost faith.
With confidence, persistence, and profound faith,
you prayed daily for the conversion
of your beloved husband, Patricius,
and your beloved son, Augustine;
your prayers were answered.
Grant me that same fortitude, patience,
and trust in the Lord.
Intercede for me, dear St Monica,
that God may favorably hear my plea.
(mention your intention here)
Grant me the grace to accept His Will in all things,
through Jesus Christ, our Lord,
in the unity of the Holy Spirit,
one God, forever and ever.
Amen

See as well https://catholicsstrivingforholiness.org/august-27-st-monica-patroness-of-mothers-married-women-and-widows/