Watching this video on Ajahn Brahm talking about how to deal the suffering of loved ones helped me a lot. In short, he talked about reducing our emotional suffering by not attaching "ownership" to one's spouse, children, parents etc. Ajahn Brahm also taught that our loved ones in critical condition will not want us to suffer seeing them in such condition, and we should be strong for them. Furthermore, crying or lamenting cannot help anyone, so we need to compose ourselves and have a cup of tea (or anything you prefer).
One beautiful thing he taught is that our loved ones suffering offer us the opportunity to take care of them, serve them and generally do good. This is really an encouraging way of facing the situation I'm in now.
To Ajahn Brahm, you have my deep gratitude and respect for your kindness & enlightening teachings.