‏السلام عليكم ورحمة الله وبركاته ya ustadh which books and lectures would you recommend an expecting first time mother? barakallahu feek.

I don't have specific works, but I heavily encourage the works of Shaykh Abdur Razzaq al-Badr (may Allah subhanahu wa ta'ala preserve him), such as: 1. Book of the Righteous Woman 2. The Hadith of Manners Books like these serve the family well.