Is overthinking violate third precept?

I have noticed most of the time third precept is interpreted as sexual misconduct or adultery. But third precept emphasize all the misbehavior and misconduct using all six sensual spheres. "Kamesumichchara" in here kama means involvement of all six sensual spheres. E.g in this answer; One must abstain from committing adultery or sexual misconduct. Romantic relationships that are emotionally or spiritually damaging to others, due to existing commitments of the parties involved, are a cause for stress and suffering and based on perversion of the mind. My question is how fair or correct to narrow third precept to sexual misconduct or adultery? Does over-thinking violate third precept because its a misconduct of mind due to uncontrollable and misuse mind?