on contrary, you have serverely underestimated our own nuclear prowess. by the time india manages to ready a single missile to launch or before a single su30 would even reach the runway to take off, all of indian cities would already be under our nuclear firestorm and getting eradicated.
Indian missiles are ready to launch nuclear weapons, right now, as we speak.
Indian has 1 SSBN in the ocean with ability fire 12 Nuclear missiles on Pakistan and 3 more SSBN under construction with ability to carrying 24 nuclear missiles each.
When a SSBN launches a nuclear strike, you will not even get a warning, to arm your missiles or fire them.