A Pennsylvania woman charged with killing her son and trying to kill her daughter sent a video of the boy’s apparently dead body to his father, among several text messages in an argument that lasted more than two hours, police said.

Christian Clark, 21, of McKeesport, Penn, is charged with killing her 17-month-old son, Andre Price III and attempting to kill her 2-year-old daughter, Angel. Clark was arrested without bond after being arraigned on criminal homicide and attempted homicide charges.

Police say at 10:14 p.m. Tuesday, Clark sent a video to the boy’s father, Andre Price Jr., showing both children lying face-down on an air mattress, the Associated Press reported.

“Ahh look Angel is still alive and sweating your son on the other had is not even breathing, I wish I could keep the camera still,” Clark is heard saying in the video, according to a criminal complaint.

In another video, Clark grabbed Angel’s head, making her cry. Police said Clark grabbed Andre’s head and he didn’t respond.

“First of all she is clearly fine, because watch, see she is not dead. Him on the other hand, he doesn’t budge. So you might want to call the ambulance,” Clark said in the video.

According to the complaint, Clark was arguing with Price via text message because she was upset he had left for work earlier in the day, and Clark believed he had gone to have sex with another woman. She started sending the increasingly violent text messages around 9 p.m., including the videos and photos of each child. Clark acknowledged she was responsible for her son’s death, and later admitted to smothering him by holding him face-down on the air mattress.

“I’m sure it’ll hurt me one im sitting in jail & you got all the evidence you need to I can’t even say he suffocated in his sleep or say idk what happened,” Clark texted.

Price responded only six times in the argument, ignoring at times Clark’s threats. A video Clark sent showing her picking up the boy’s body and tossing him on the bed prompted Price to ask her to try and revive him, according to the complaint.

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Write to Mahita Gajanan at mahita.gajanan@time.com.