Saving the Broken Heir

A protagonist has a one-night stand with Ian Harrison, becomes pregnant. She finds him about to jump after Ava Lowe broke their engagement. She stops him with an abortion consent form, using the baby to stay by his side. Ian provides her wealth, gradually falling for her. After overcoming obstacles (Ava, relatives), they marry, and she gives birth to a daughter. Ian transforms from suicidal heir to doting husband and father. They have another son.