16 and Pregnant

Law enforcement sources tell us ... cops in Hillsborough County, Florida responded to a battery call at the home of 19-year-old Josh Smith ... after he was allegedly attacked by the mother of his twins,17-year-old Jennifer Del Rio.

We're told Smith gave a statement to police ... explaining that he was trying to break things off with Jennifer ... when she became "irate" and "punched him in the face and pulled on his shirt."

Smith says he eventually pushed Jennifer away in self-defense.

Cops took a report -- but so far, neither Del Rio nor Smith have been arrested.

It's not the first time these two have dealt with the cops -- Smith was arrested back in November for allegedly attacking HER ... and was ordered to complete a domestic violence program.

Jennifer Del Rio -- a 17-year-old who makes her debut on the show later this month -- filed documents in Hillsborough County, Florida begging a judge to grant a restraining order against her baby daddy, 19-year-old Josh Smith.

According to the documents filed in March, Del Rio claims Smith -- the father of her twin babies -- had been "harrasing [sic] and threatened [her] saying he will have [her] raped."

Del Rio continued, "[Smith] has attempted to kidnap children." She adds, "Due to [Smith's] violence [Del Rio] is frightened for her life and children's life."

TMZ has learned Smith was arrested back in November for domestic violence against Jennifer and was ordered to complete an educational program. Smith is still in the process of completing the course.

Smith is seen in handcuffs on the promo for the new MTV show -- and we've learned the footage was shot on the same day he was arrested for the domestic violence charge back on November 4 ... just weeks after their twins were born.

In the end, Del Rio failed to appear at the hearing for a restraining order against Smith -- so the request was dropped.

Ebony -- who was on "16" season one -- tells TMZ her daughter Jocelyn was playing with her cousins in Arkansas on Saturday when she "bent down too fast right next to the fireplace"... banged her head .. and a "nice big gash" opened up.

Ebony says she immediately rushed Jocelyn to the ER -- where doctors closed up the wound with surgical glue.

Kathleen Green (above) -- the grandmother of the teen baby daddy on this week's episode -- tells us, she and her family are being targeted via texts, blog posts, and even Twitter.

Among the harassing messages ... Kathleen claims an anonymous person got a hold of her number and texted her, "You're a piece of sh*t. I'm going to bitch slap you."

But she claims her daughter Katrina -- baby daddy Isiah's mother -- got the worst of it ... because someone threatened her life on Twitter, writing, "We should do a drive by and afterwards we're going to pee on the grandma."

Kathleen Green (left) -- the grandmother of baby daddy Isiah -- tells TMZ the network "defamed" her family because "nothing that aired is what happened" in real life.

Kathleen tells us MTV set up shots and heavily edited footage in the episode -- which revolves around Isiah, his baby mama Christinna (right) and the birth of their daughter Destiny.

Kathleen says she's particularly upset with a scene involving a DNA test she bought for Christinna -- claiming she came off as a cold-hearted bitch because MTV left out one key detail -- "They didn’t show that [Christinna] had told us she had had sex with some other guy."

Now, Green says her family wants to sue the network for defamation.