Credit: Instagram

Fans of Teen Mom 2 were shocked when Jenelle Evans started doing drugs towards the end of the show's dramatic fourth season, and girlfriend's road to recovery wasn't easy (so many trips to rehab, so little time). The good news? Jenelle's been clean and sober for more than a year!

Despite the fact that this reality star is doing better than ever, it's hard for Jenelle to shake her drug-addicted past — especially because her fleet of followers bring up her drug use every chance they get. The question on many fans' minds is simple: Why did Jenelle start using heroin in the first place? This gal opened up about her path to addiction during a Twitter feud with Teen Mom 3's Briana and Brittany Dejesus (they accused Jenelle of being a drug-addict), tweeting "U think maybe the reason I did heroin was cuz I was giving up on life cuz I didn't have my son? Yeah, step down."

In case you need a refresher, Jenelle gave up custody of her son to her mom, and anyone who watches Teen Mom 2 knows how hard this decision was on her. Nowadays, Jenelle and her kiddo spend more time together than ever, and Jenelle even told Briana that Jace is about to become her permanent roomie. "I'm clean sober and happy with life," Jenelle continued. "About to gain custody and doing better."

With any luck, Jenelle will gain custody of her little man before giving birth to her second child — due Summer 2014!

Are you surprised by Jenelle’s admission? Let us know in the comments below.