I'm very sorry for your family's loss.
I'm not sure I'm clear on what you mean, but I'll go with what I interpret lol
I think it would be best to send from you, your husband and your boys. For example, "husband's name, Barb, & boys" or you could specifically include your boys names, along with your name and your husband's.
I don't really know what the rules are, but have sent sympathy flowers many times and always included my children, even if I put "children" instead of each of their names.
Hope this helps,
Ali