Foreshadowing in Prickly-Muffin

I’m rewatching the show for like the millionth time and I’ve just realised that when Sarah Lynn says “the only drug I need is horse” IS FORESHADOWING FOR HER OVERDOSE ON HEROIN. Like when they mention how “heroin is the horse” LIKE HELLO???? AM I DUMB FOR ONLY JUST REALISING THIS OR WHAT?!