julie schenecker , 54 , was found guilty last year of murdering her son beau , 13 , and daughter calyx , 16 , in their tampa , florida home in january 2011 .
in a jailhouse interview , she has now revealed she does not regret it .
she claimed her son was being sexually abused - but would not say by whom - and that her daughter was struggling with mental illness .
authorities said she had admitted to shooting the children for being ` mouthy ' and her journals detailed how she was going to kill them .