Britney Spears talks about estrangement from her sons

Britney Spears has posted a series of short audio clips on her Instagram page in which she talks about why she is no longer in touch with her

two sons, Sean Preston, 16, and Jayden, 15. In the five-part audio recording, Spears, 40, discusses her grief about losing

contact with her sons as well as her poor relationship with her father, Jamie Spears, stating that she "hopes he burns in hell.

" In an interview with 60 Minutes Australia that aired last week, Jayden defended his grandfather in an interview,

stating that people do not "get how much he cares about her." The adolescent and his sibling reside with their father, Kevin Federline

who claims that his ex-social wife's media activity embarrasses and repels them. In the audio tape, Spears muses on the suffering she has been through

due to the absence of her children, stating, "I feel like a large part of me has died." "At one point, I had more children than Kevin," she says.