The base game is very rigid regarding monogamy. If a Sim so much as flirts with another, their spouse will catch them and the relationship takes a massive hit. Taboo mods often allow players to toggle jealousy, enabling them to simulate polyamorous households, open marriages, or swinging lifestyles without the entire household descending into chaos.
In the deepest, most heavily moderated corners of the internet, there exist mods that target the "Teen" or "Child" life stages. sims 4 taboo mod download
Searching for and installing any mod from unofficial sources carries risk, but the risk multiplies exponentially when searching for taboo content. Why? Because mainstream sites like CurseForge, The Sims Resource, or Patreon actively ban explicit or dangerous mods. Therefore, taboo mods live in the digital underground—unregulated forums, private Discord servers, and file-sharing sites. The base game is very rigid regarding monogamy