section 497 of IPC deals with adultery . if you had relations with a married women her husband can file case of adultery against you . under this section only the male offender is liable but the lady goes scot free .
under section 497 of IPC in case you had sexual relations without the consent or connivance of her husband it is punishable with a imprisonment for upto 5 years orfine or both . in such cases wife cannot be punished as an abettor
you have mentioned that the married women wants to hold you accounable . did you have sexual relations with her under promise of marriage . did you exchange any emails sms or letters wherein you promised her marriage . in such a case she can file case of rape against you .