The executors of Whitney Houston's estate have reached an agreement with her daughter Bobbi Kristina Brown over payments.While members of the trust - including the late singer's mother Cissy and sister-in-law Pat Houston - launched a legal bid to stop the original payment schedule over fears those close to her could take advantage, all parties have now come to an agreement which is similar to the original plan, according to TMZ. Bobbi Kristina is set to receive her money in three segments, 10 per cent when she turns 21, almost 20 per cent at age 25 and the remainder when she turns 30. The 19-year-old reality TV star - who is engaged to Nick Gordon - is the sole beneficiary of her mother's estate. Nick was informally adopted by Whitney when he was 12 and the pair were raised as brother and sister. They have said they were ''always close'' growing up but their relationship changed as they got older and they sought comfort in each other after Whitney's death in February and started living like a couple in Atlanta. Whitney drowned in the bathtub of her Los Angeles hotel in February.