Police can do any thing.
498a is non-bailable and police just by looking at complaint from woman, can lodge FIR on husband as A1 and family.
Indian law is gender biased. Woman and relatives can always bribe police and can file FIR.
Police can register without any inquiry.
Generally, chargesheet is cut and paste of FIR.
It takes 2 to 3 years to close the case in court.
Generally conviction is very low 2%. It is very difficult for your wife to proove beyond reasonable doubt.
She can write all false stories in FIR and you need to proove in court that allegations are false.
Still if you love your Kid and Wife, use relatives and settle the matter outside.
Else fight the case on merits and it takes 2 to 3 Years for sure.
Let me know if you need any inputs.