As to the house, you need to review the "grantee" section of the deed. A person can only devise what their interest is in real property. If your father owned the house 100%, and then deeded the house to his three children, 1/3 each, with no mention of a trust, then the trust has nothing to do with it. It's what is stated on the deed.
If there was no will, your sister is WRONG. Trustee fees Are NOT the same as executor's fees. Executor's fees are often set by law if the will is silent about them. Conversely, trustee's fees are often NOT set by law if the trust is silent about them. The standard would be that the fees are "reasonable." This would depend, among other things, on the complexity and length of time in administering the trust. It is not unheard of, perhaps it is even usual, for family members to waive fees they are legally entitiled to where the will or trust is a straightforward affair. For your sister to use the fees as a sort of weapon is a signal I think that you all need that lawyer who said his work was done. The three siblings need a sit-down with him or her. At the very least you could clear up the matter of the fees. The lawyer could give guidance on what "reasonable" fees would be in this case, and clear up the matter of the house. He or she might even suggest the waiver of fees if the trust is a fairly easy affair. I think such a meeting wouldn't necessarily cost a ton of money.