Some background on this:
In this Universe, Morinth escaped from her mother and went into hiding.

After the war was over, the Asari population was greatly diminished. In order to keep their laws intact and ensure the species survival, the bodies of wanted Asari criminals who were executed were fiitted with nanomachine-fiilled control units that maintained their bodily functions. They were then auctioned off to the highest bidders to help generate income for their planets restoration. This allowed the dangerous Asari to be dealt with and still be able to concieve children, ensuring their race's survival without worry.

A few months after the war both Morinth and Liara were captured and executed for their crimes (Murder and Espionage). Not wanting their bodies to wind up with some random bidder, Commander Alenko used his influence as a high ranking official to purchase both bodies outright. Although Samara was saddened by her daughter's death, she was glad to have her daughter's body with her. She even allowed Kaiden to impregnate her so she'd finally be able to have a grandaughter.
As for Liara, she ended up as Kaiden's personal sextoy to do whatever he wanted to her.