Got my 100% settlement from the va,, now a lady wants me to marry her, so when i die she can have my benefits?

how long do i have to live before she gets anything,, and does her 4 kids from 4 different black guys who pay no support,, do they get anything,, and do i get anymore money to take care of her and her brats,, Oh shes on section 8 and oregon trail for food,,is there any advantage in marrying this blood sucker,,