MNRIVRAT try living in a wheelchair sometime. It well change your prospective.
For a full mobile person a fanny pack would work, but is mostly no good for people in wheelchair. Think big clip in your back
A belly band might work, but is very subjective to a persons build when seated.
Ohio Duty to retreat
2901.09 No duty to retreat in residence or vehicle.
(A) As used in this section, “residence” and “vehicle” have the same meanings as in section 2901.05 of the Revised Code.
(B) For purposes of any section of the Revised Code that sets forth a criminal offense, a person who lawfully is in that person’s residence has no duty to retreat before using force in self-defense, defense of another, or defense of that person’s residence, and a person who lawfully is an occupant of that person’s vehicle or who lawfully is an occupant in a vehicle owned by an immediate family member of the person has no duty to retreat before using force in self-defense or defense of another.
Your lady has special circumstances regrading her mobility I would consider it prudent to have a recorded or written statement from the local prosucuters office in relationship to her mobility issues as it relates to the duty to retreat outside of the refernece i have listed above.
Holsters
Option One
cross draw carried at 11 o'clock or 1 o'clock depending which is her strong side. You wear cross draw on the weak hand or support side. They are made for sitting long periods
Option Two
http://www.undertechundercover.com/
Option Three
http://gizmodo.com/5801435/a-bra-gun-holster Bra holster - I can think of a couple of real upsides for this one
Option Four
mount a mini gun on each side of her chair under tear away covers. the real bear would be the weight of the ammo.