Rock heiress Frances Bean Cobain's estranged husband Isaiah Silva is reportedly demanding $25,000-a-month in spousal support.

Frances, 24, the daughter of the late Nirvana frontman Kurt Cobain and Hole musician Courtney Love, filed for divorce from Isaiah in March (16) after a two year marriage.

According to editors at TMZ.com, court documents show Isaiah, 31, is demanding at least $25,000-a-month from the star as he alleges she agreed to help him financially throughout their union.

He reportedly claims he quit his job when the couple wed, as Frances made financial commitments to him including monthly expenses, school fees for his daughter from a previous relationship, and housing costs.

The court documents allege that Frances is worth more than $100 million due to her father's estate. Isaiah is also said to be demanding half of the money she earned through her business dealings during their marriage.

Frances' original divorce filing sought to establish that the money from her father's estate is her's alone, but indicated a willingness to pay an unspecified amount in spousal support.

Isaiah's filing apparently suggests that the couple did not have a prenuptial agreement in place when they wed.