Spiritual Motherhood
A vocation for women to offer their lives for the sanctification of priests.
See:   Eucharistic Adoration for the Sanctification of Priests and Spiritual Maternity -Congregation of the Clergy

Mothers of the Cross live a special call to be spiritual mothers for priests in our Love Crucified Community.

Holy Mothers lineage  Jacqueline
St Gemma offers herself in reparation for souls, specially priests and nuns
Spiritual mothers of priests make their oblation at Tulsa This can be done in other dioceses with the bishop's approval
  Understanding Spiritual Motherhood  Mary Kaufman, Vocation and Prayer Magazine, Jan/Mar 2010

Links to other sites on Spiritual motherhood

The most important person on earth is a mother.
She cannot claim the honor of having built Notre Dame Cathedral. She need not.
She has built something more magnificent than any cathedral-a dwelling for an immortal soul, the tiny perfection of her baby's body… The angels have not been blessed with such a grace. They cannot share in God's creative miracle to bring new saints to Heaven. Only a human mother can. Mothers are closer to God the Creator than any other creature; God joins forces with mothers in performing this act of creation…What on God's good earth is more glorious than this: to be a mother?
-Joseph Cardinal Mindszenty