Matthew Henry Presbyterian @wholebiblehenry

Observe, 1. Wicked children are an affliction to both their parents. They are an occasion of anger to the father (so the word signifies), because they contemn his authority, but of sorrow and bitterness to the mother, because they abuse her tenderness.

John Gill Reformed Baptist @doctorgill

A foolish son is a grief to his father,.... Because of his folly and wickedness, and the ruin he is bringing himself to; and bitterness to her that bare him; a cause of bitterness of soul to his mother, more distressing than the bitter pains with which she brought him forth into the world.

Jamieson-Fausset-Brown Reformed @jfbcommentary

a grief--or cross, vexation (compare Pro 17:21; Pro 10:1).