Hi... Pls seek professional help.
Marital Counselling/Couple Therapy is required in your case. You both need to work upon your relationship with each other and also upon the sexual aspect of your relationship.
Issues with in-laws are very common but if she is suffering from body image issues, it requires professional attention.
Next Steps
Consult a Psychologist.
Marital Counselling/Couple Therapy is required.
CBT for Body Image Issues.
Health Tips
Mr. Gunjan Maithil
Senior Psychologist
Cell: Nine Six Seven One Three Zero Three One Three Four (whatsapp)
Website:https://gunjanmaithil.wixsite.com/therapy
App: http://wix.to/fECHB08?ref=cll