1. The proofs she produced before court to prove your income should convince the court for granting maintenance.
2. If she is Qualified but sitting idle at home for seeking maintenance, this may brought to the knowledge of court which may decide accordingly.
3. The notice abandoning your relationship by your parents will not have any impact to this case neither your parents would get any relief on this count.
4. You have to rely upon the merits from various incidences to defend your interests in the case.
5. If that is against you then you can utilise that in the defence.