Alejandra Jackson -- the baby mama of multiple Jackson offspring and ex of two of Michael Jackson's brothers -- claims in new court papers the Executors of Michael's Estate threatened to fumigate the Jackson family house while she was living there and remove all the food.
TMZ broke the story ... Katherine Jackson is trying to evict Alejandra from the residence, but Alejandra won't leave.
In her legal papers objecting to the eviction, Alejandra claims the Executors of MJ's estate are trying "to advance ulterior and pompous interests, which are not consistent with the wishes and values of Michael Jackson."
Alejandra claims Katherine doesn't even want her evicted, but says she was "pressured by the Estate" to get her out.
Alejandra claims the Estate is trying to divide and separate the Jackson family.
Alejandra says the Executors threatened to fumigate the house on January 3, 2011 whether she and her kids were in the house or not.
Alejandra also alleges the Executors shut off the gas and began changing the locks while she and the kids were there. She says the Executors even had all the food in the house packed up.
Estate lawyer Howard Weitzman tells TMZ, Alejandra's allegations are "preposterous."