Mexican Cartel Tried Forcing American Kidnapped Siblings to Have Sex

Two of the people kidnapped in Mexico and survived say their captors tried forcing them to have sex with each other ... and their account is terrifying.

LaTavia Washington McGee and her brother, Eric Williams, sat with CNN's Anderson Cooper Tuesday to tell their story for the first time since being rescued following an abduction in March ... when the cartel took them and 2 friends, who were killed in the ordeal.

Cooper asks if there were threats or demands made of them during their time with the cartel, and the two siblings sadly say yes ... namely, that the kidnappers asked that they sleep with one another. McGee and Williams say they pushed back -- telling the cartel members they were related ... and McGee was pregnant at the time.

They never addressed what ultimately happened ... but it just speaks to how depraved these criminals are. From the way it's described, it seems like they only ordered that for their amusement.

McGee and Williams go on to describe a moment when they were being transported by the cartel members ... they say the abductors piled them into a truck with dead bodies and were moving them all over the place with the promise of eventually letting them go.

In the end, the two other Americans -- Shaeed Woodard and Zindell Brown -- attempted to make a run for it ... but were gunned down. The group of four was originally traveling from Texas when they were taken near the border city of Matamoros in dramatic fashion.

The cartel members held them up at gunpoint and threw them into the back of their vehicle ... but after realizing they had kidnapped the wrong people -- apparently, per law enforcement officials, they might've thought they were Haitian drug smugglers. The Cartel was trying to find a way to get the crew of 4 off their hands without facing repercussions.

Unfortunately, two people lost their lives in the drama ... and the cartel even issued an apology for how everything went down. McGee and Williams were found on March 7, and the bodies of their friends were taken back into U.S. custody following the rescue operation.