I was surprised to see Kiesha was buried in an open area in the woods.
I too doubt R&K buried Kiesha together but they may have. K&R had a newborn and a toddler to take care of and Rob said he couldn't assist in the search for Kiesha because their children needed them but I wouldn't be shocked to learn Kristi did leave her children who were completely dependent on her alone occasionally. CPS was called many many times to investigate allegations Kiesha was being grossly abused at home and they were powerless to stop it so Kristi didn’t live in fear of loosing her children. Remember when Kristi went upstairs to visit her neighbor shortly after her son was born without Kiesha? IIRC Kiesha's sister wasn’t there either and Kristi didn't explain where her daughters were so perhaps she left them alone at home. She didn't say the girls were in her husband's care and AFAIK, the neighbor didn't ask her where they were.
This sick couple have emotionally wounded and deeply scarred a lot of people. I suspect the reason Kristi is distraught in jail is because they got caught. She was sure cocky before they were arrested; flashing her finger with **** U written on it at the camera and chanting "don't judge me". She didn't attend her daughter's vigil either IIRC.
If she murdered her firstborn, she got away with murder once already and she was free to visit his grave whenever she pleased, so perhaps this is why she figured she could visit her daughter's gravesite and she wasn't able to differentiate and take the cost involved seriously.
One of these two should have put their foot down when their partner suggested they visit Kiesha's gravesite on her Birthday and made them see what they stood to loose if they followed through with such an absurd idea. One of them should have refused to discuss the matter any further and refused to accompany them. But this couple is very unstable and they aren't able to offer each other the love and emotional support they need to "make it" so they blindly walked into a situation most couples would have chosen to avoid. On the other hand, I am glad they did make this choice because they lost their right to raise their remaining children and now they have to face and live with the consequences of their actions. Fortunately Justice is being served in this case.