Is the process of Novation a possible method for me to use?

i have recently heard about something called novation and am interested in finding out if it is something that i can use. i want to get out of my mortgage with my ex-girlfriend who is willing to re-fiance our home herself with a co-signer (her grandmother) and then i would quitdeed my share of the home to her. is novation another possible method to expediate this process since she is taking her time in even beginning the re-fiance process? as far as i can ascertain, someone (her grandmother) would in essence using this process merely take over my loan/mortgage obligations, is this true....if the mortgage company allows such an action? if it can be used, then the entire process could be more easily done and my ex-girlfriend can take her time in re-fiancing in the future or not. anxious about finding out more about novation and if it is something that i can use, or not.