My MIL passed away and I need help to help my Wife through this

My MIL passed away recently and my wife, understandably, is a complete mess. She cannot stop crying all day long and continues to miss her like anything. The worst part is that we cannot travel to our home country due to the political situation in the recent past. This meant that we couldn't attend her funeral and had not seen her in over 4 years. We were hoping to be able to visit our family back home by the end of the year.

Like the title says, I need help to figure our how I can be there for her. I hug her all day, talk to her and comfort her the best I can. But I feel I am failing and that she is becoming sadder by the day.

Any help or tips on how I can do better, is much appreciated.