If probate is not needed, & all children have gone through home & gotten what they wanted, can executor tell me I can't go back in & get more?

There are 5 children. My sister is executor. She gave us the day of the funeral to go pick out what we wanted out of the house & put our names on it. The next day she says it is closed for us to go put our names on anything. We agreed verbally among us that what none of us wanted we would sell. I want to go back out & look again but she says it is closed now & I cant. As executor, can she do this?