What stops you from sinning in heaven?

[Neo-Scholastic]

Short answer is no [freewill in heaven].

Wouldn’t the concept of ‘Christian Liberty’ apply. The damned are imprisioned by the obsessions of their evil desires and the illusions they use to justify them. In contrast the saved remain free to choose among multiple ways of loving the Lord and their neighbor.

…bible does not say [what kind of bodies we have].

Other than sharing the glorified state of Christ. Presumably we will share the abilities demonstrated by our risen Lord during his post-resurrection period.

We elect to live in the Expressed will of God.

Couldn’t you also say…”The elect live to express the will of God.”