The florist was silly and should have said she had not got enough materials to fill the order and suggest an alternative supplier.
What we see, yet again, is a plan to deliberately push the gay agenda. If the buyers were half decent, and, as suggested, good previous customers, they should have anticipated the response and accepted it. But, oh no, the point of discrimination had to be pushed to the limit. It seems, despite the legalities, that little tolerance was paid to the florist.