Last week, EA released details on the upcoming Sims 4 Lovestruck DLC, which'll include a new urban world called Ciudad Enamorada, dating apps for your Sims, death by heartbreak, and polyamorous relationships. That last part seems to be what has a lot of players psyched, but there's been a little confusion over whether or not polyamory is paywalled.
Rest assured that although you've got to pay for the DLC to get the dating apps, having multiple partners is free. It's your Sims' social calendars that won't be free...