USA to UK for Funeral

Both my parent have passed away. Mum in May, Dad in June. Mum Dad, my big brother and I live in America. But we are all from English born. We are burying them both in Wellington England on October 14th (their 53rd wedding anniversary). And I have no funds to make it there and back. My big brother has footed the air fair to get me there and back. But i feel that i cant take money from a man going through a messy divorce. A little about me, I have two children. My boy is 16 and is an A B student. And I have a soon to be 3 year old who starts headstart in a couple weeks. Neither one of them are biologically mine as i cant have children. But i have a very good relationship with their bio mom. And she lives with us and takes great care of them while i work a 40 hr a week job. And i also go to community college in the early mornings and late evening. Where i am going for a business degree that i hope to transfer to portland state university. All i want is to make my childrens future bright and honor my parents memory.  Any help would be greatful. Thank you in advance.