Looks like fans can expect more big news from Jenelle Evans. On May 16, the Teen Mom 2 star announced her surprise engagement to on-again, off-again beau Gary Head. Now insiders are bussing that Jenelle — who "put on 20 lbs. recently," according to a source — is expecting her second child. 

OK! NEWS: TEEN MOM 2 JENELLE EVANS SHOWS OFF HER BREAST IMPLANTS IN A BIKINI — SEE PICS! 

"She's so irresponsible, it wouldn't surprise me if she's pregnant. But for her to want another child would be crazy, because it doesn't seem to bother her at all that she doesn't have custody of Jace [2-year-old son]," says an insider. "But Gary loves Jace, and it wouldn't be shocking if he wanted a sibling for him and a child of his own." 

Even if they do become parents together, will fickle Jenelle, 20, ever be his bride? 

OK! NEWS: TEEN MOM 2 STAR JENELLE EVANS ENGAGED TO GARY HEAD!

"She just broke up with Kieffer [Delp] a week before the engagement and immediately got back with Gary," the insider explains. "He's thrilled, because he had asked her to marry him before and she said no. I guess she changed her mind." 

FOR MORE ON JENELLE'S PREGNANCY SHOCKER, GRAB THE NEW ISSUE OF STAR IN STORES NOW! 

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