LetDown adds a self-contained lactation system to The Sims 4: a Sim fills with milk over time, her body responds, and that milk becomes something you can express, sell, cook with, or drink.   How it works Get lactating. Order a Lactea Supplement from the mailbox (§15) and take it, or let it trigger automatically after giving birth. The Sim gains the Lactating trait and a fixed milk flavor. Fullness builds over time. As milk accumulates, moodlet buffs escalate throu