Is it permissible for a man's ablution not to be nullified by touching his wife's hand, while his wife's ablution is nullified by touching her husband's hand, as is practiced in the Hanafi school of thought?

Touching the hand or any other part of the body does not invalidate ablution according to the Hanafis, unless there is an immodest direct contact involving their nakedness and the touching of the private parts. We are not aware of any statement that says a man's ablution is not invalidated by touch while a woman's ablution is.