My boyfriend is grieving and in a hell of a state. How can I help him?

On Wednesday 1st of December, my boyfriend called to tell me his dad died suddenly. He was 42 years' old. My boyfriend is 24 and now has no parents. We are expecting a baby in the new year but at the moment he is obviously and understandably, inconsolable experiencing the natural stages of grief. He has never been through the loss of a family member before so this is all new to him. He was incredibly close to his dad as it was he, along with the help of his grandparents, that bought him up until he joined the army 7 years ago. Unfortunately, his grandmother is terminally ill, and along with his grandfather, is as I write this, aboard a cruise ship in the med until next wednesday, when they dock at southampton. He has managed to contact his grandparents to inform them of the tragic news, however he has been left with the impression that the sole responsibility of arranging everything but more honouring the costs, is going to fall on his shoulders. His grandfather has just paid the medics aboard the ships hospital a significant amount of money for his wifes care, and mentioned this to my boyfriend. I have talked with my boyfriend in trying to reure him that i am sure this was just said in conversation and not meant to be taken for my boyfriend to shoulder all responsibility. Everyone is in a state of shock, including my boyfriends' grandfather, who has decided against telling his wife of her sons death. He has asked me twice now to accompany him to see his dad and twice has changed his mind and said no but i completley understand due to the fact that we may have to be away for a few days and there is no one to look after our dog and two cats. Although I am heavily pregnant and due soon, I want to support and help him in any way I can but for myself, selfishly, am finding it incredibly difficult as to know what to do for the best, apart from just going along with what he wants and to be patient. His dads body will not be released now until the new year as we were informed by the coroners office today, as an inquest now has to be held etc so you can imagine how in limbo both my boyfriend and his grandparents are going to feel. Im looking in to help with funeral costs etc on behalf of and for my boyfriend, just incase its needed, while he is away dealing with everything. But i feel completely useless right now, as hes due to leave in a few hours and i desperately want to go with him and help/support him. I want to be the one to hold his hand when he goes in to see his dad, not someone else, like his dads mistress. Selfish as that sounds on my part, its how i feel and is not about me whatsoever. Im at a loss as what to do and concerned that hell lose all interest in the baby. I have told him that his dad would want him to make him proud and be a great dad as i know hes going to be. Just dont know what to do? Please help?? Its breaking my heart seeing him like this.