My mother in law has a irrevokable trust naming my husband and his sister as beneficieries when she dies. She can sell the home at anytime and disburse the funds in anyway while she is living and the trust will be voided. My question is: Is there anything that can be wrote in this irrevokable trust to ensure both beneficeries can still end up with equal inheritance if the home is sold? Lots of problems and trust issues in this family. My husband fears mom will sell and give all to sister. Sister is very greety and influential... long story!
Thank you

Simple answer no. See link.

Irrevocable Trust (http://www.investopedia.com/terms/i/irrevocabletrust.asp)

This is just regarding the estate. The other items would probably be addressed in her will if she has one.

And remember... it's the mom's money. She can leave it to whoever she wants... both the kids equally, all to the sister, the guy who picks up the trash... Best bet, in my mind, is to expect nothing and be appreciative of what you get.