This was highlighted factors for me, often Manipulation can't be recognised in plain sights. The person twists that into as my choices, it's my nature, or trapping other person in web of lies. They will implement, and force a person to accept their conditions without considering their own conditions.
I liked about boundaries, having healthy boundaries by keeping an inch extra is good one. Having boundaries is fine but till when it sounds fine? You explained it in simple terms along with examples.