Jack-pot
Da "motherlode" of weed-plants dat da hill-climbing male teenager located and shared wif Jill, causing said vagina-equipped hiking-companion to disregard biological common sense and agree to "do something" wif her fellow climber of small mountains, and then become a "little mother" as a result.
In da modern-day parody on da super-famous Mother Goose rhyme, Jill may indeed have felt like she'd "hit da Jack-pot" when her "neck and giblets"-possessing walking-chum showed her da patch of Mary Jane dat he'd been cultivating, but she sure-as-shootin' didn't feel so lucky a short while after said horny stud had inserted one of said located-between-his-legs implements into her love-tunnel, when her abdomen started to swell!