Surge of 'honor killings'
The killings are the latest in a recent surge of so-called "honor killings" in Pakistan.
Earlier this month, another pregnant woman was killed by her family in eastern Pakistan because she married against family members' wishes three years ago, according to police.
Muqaddas Tawfeeq, who was eight months pregnant, was visiting a maternity clinic for a checkup when her mother appeared and "dragged her away" to her maternal home, her husband told CNN. Once there she was attacked by her brother, who slit her throat, police said.
And in another incident in Pakistan within days of that attack, a man beat his teenage sister to death with a large wooden stick, reportedly because he didn't want her to marry her boyfriend.
Pakistani teen burned to death by family
Pakistani teen burned to death by family 02:39
The victim's father, Yousuf Masih, said they were against the match because the two families were related.
"They started arguing," he said of his daughter and son. "He hit her with the stick, he has no intention to kill her. Things just got out of hand, he reacted in anger. In the end, I guess it did become an issue of honor."
Violence against women is rampant in Pakistan, according to the independent Human Rights Commission of Pakistan.
It said that in the first five months of 2016, as many as 212 women were killed in the name of "honor." In a case earlier this month, a Pakistani teen was burned to death by her mother and brother for eloping against their wishes.
The crimes originate from tribal and cultural practices and are often meted out as punishment for behavior viewed as bringing dishonor to a family or village.
Honor killings in Pakistan's Christian community, which the Masih family belongs to, are "extremely rare," said Peter Jacob, a minority rights activist and secretary at the National Commission for Justice and Peace.
Why Pakistan must act against this brutality