Hi... Please consult a Psychologist for your guidance & counselling alone and if your partner is willing do seek marital counselling. Based on what you have shared above, I do not think this is the only/primary reason for her to seek separation. I believe there are multiple other issues underlying and this has become the 'last jaw to break the camels back' (metaphor). You need to address your concerns in a therapeutic setting to overcome this predicament in your marital life.
Next Steps
Consult a Psychologist.
Interpersonal Relationship Counselling or Marital Counselling is required.
Health Tips
Mr. Gunjan Maithil
Senior Psychologist
Cell: nine six seven one three zero three one three four
Website: https://gunjanmaithil.wixsite.com/therapy
App: http://wix.to/fECHB08?ref=cl