A Texas teenager staged a suicide by his 8-months-pregnant sister to cover up the fact that he strangled her because he thought she was an “embarrassment to their family,” cops charged Monday.

Eduardo Arevalo, 19, wrote a phony note that was found by his relatives in which Viridiana Arevalo, 23, purportedly said she wanted to kill herself, officials allege.

In reality, Eduardo choked the life out of Viridiana on Dec. 16, one day before her boyfriend reported her missing to cops in The Colony, 30 miles north of Dallas, police Sgt. Aaron Wood­ard said. Following the murder, according to Woodard, Eduardo stuffed his sister’s body into the trunk of his car and dumped it in a remote area about an hour away from their home.

But when his family started questioning Viridiana’s disappearance, Eduardo retrieved her body and left it in an alley in The Colony, where neighbors found it Sunday and called the police, Woodard said.

Investigators quickly zeroed in on Eduardo, who allegedly confessed to the crime and described it as an honor killing.

Eduardo claimed that his sister was an “embarrassment to their family” and that “it would be better off that she wasn’t here,” Woodard said.

In addition to admitting that he faked the suicide note, Eduardo described the gruesome retrieval of his sister’s body nearly a week after her death, Woodard said.

“As the week went on, Eduardo stated that he wanted his family to know where Viri was, at so he went and picked up her body and brought her back Sunday morning in the early morning hours and dumped her body in the alleyway,” Woodard said.

Cops credited local residents with helping them crack the case by turning over video from “their home surveillance and doorbell cameras.”

“That really assisted the investigation and helped piece together the timeline for this,” Woodard said.

Neither Viridiana’s boyfriend, who fathered her child, nor any of his relatives are suspected in the slaying, cops said.

Eduardo has been charged with capital murder because his sister was pregnant.

Under Texas law, he would face either the death penalty or life in prison without parole if convicted.

He could also face additional charges.

Eduardo is being held without bail in The Colony Municipal Jail.