TPH, Is possible such a data structure like this - entity-framework

Question

I'm trying to create a tables using Code-First in EF.
I created many versions of my code but I put here only one. It almost works, it means this code creates sql but doesn't work properly.
What I want to get:
I have 2 simple tables : Order and Payer.
Also, I want to create a third table based on foreign keys of these 2.
It wont create it that meet the following rules:
Each Order has exactly one Base Payer. (So I don't need complex key in this case. OrderId can exist only one in this table if record is type of (Base)OrderPayer
Each Order can have 0,1 or many (Extra)OrderPayer. ( So in this case i need put into table complex Key (OrderId + PayerId)
here is my last C# code
public class Order
{
[Key]
public int OrderId { get; set; }
public string OrderName { get; set; }
public virtual BaseOrderPayer BaseOrderPayer { get; set; }
public virtual ICollection<ExtraOrderPayer> ExtraOrderPayers { get; set; }
}
public class Payer
{
[Key]
public int PayerId { get; set; }
public string PayerName { get; set; }
}
public abstract class OrderPayer
{
[Column(Order = 0), Key, ForeignKey("Order")]
public int OrderId { get; set; }
public virtual Order Order { get; set; }
}
public class BaseOrderPayer : OrderPayer
{
[ForeignKey("BasePayer")]
public virtual int? BasePayerId { get; set; }
public virtual Payer BasePayer { get; set; }
}
public class ExtraOrderPayer : OrderPayer
{
[Column(Order = 1), Key, ForeignKey("ExtraPayer")]
public virtual int? ExtraPayerId { get; set; }
public virtual Payer ExtraPayer { get; set; }
}
and SQL that was generated by Update-Database -Script
CREATE TABLE [dbo].[OrderPayers] (
[OrderId] [int] NOT NULL,
[ExtraPayerId] [int],
[BasePayerId] [int],
[Discriminator] [nvarchar](128) NOT NULL,
[Order_OrderId] [int],
CONSTRAINT [PK_dbo.OrderPayers] PRIMARY KEY ([OrderId])
)
CREATE TABLE [dbo].[Payers] (
[PayerId] [int] NOT NULL IDENTITY,
[PayerName] [nvarchar](30),
CONSTRAINT [PK_dbo.Payers] PRIMARY KEY ([PayerId])
)
CREATE TABLE [dbo].[Orders] (
[OrderId] [int] NOT NULL IDENTITY,
[OrderName] [nvarchar](30),
[BaseOrderPayer_OrderId] [int],
CONSTRAINT [PK_dbo.Orders] PRIMARY KEY ([OrderId])
)
CREATE INDEX [IX_OrderId] ON [dbo].[OrderPayers]([OrderId])
CREATE INDEX [IX_ExtraPayerId] ON [dbo].[OrderPayers]([ExtraPayerId])
CREATE INDEX [IX_BasePayerId] ON [dbo].[OrderPayers]([BasePayerId])
CREATE INDEX [IX_Order_OrderId] ON [dbo].[OrderPayers]([Order_OrderId])
CREATE INDEX [IX_BaseOrderPayer_OrderId] ON [dbo].[Orders]([BaseOrderPayer_OrderId])
ALTER TABLE [dbo].[OrderPayers] ADD CONSTRAINT [FK_dbo.OrderPayers_dbo.Payers_BasePayerId] FOREIGN KEY ([BasePayerId]) REFERENCES [dbo].[Payers] ([PayerId])
ALTER TABLE [dbo].[OrderPayers] ADD CONSTRAINT [FK_dbo.OrderPayers_dbo.Payers_ExtraPayerId] FOREIGN KEY ([ExtraPayerId]) REFERENCES [dbo].[Payers] ([PayerId])
ALTER TABLE [dbo].[OrderPayers] ADD CONSTRAINT [FK_dbo.OrderPayers_dbo.Orders_Order_OrderId] FOREIGN KEY ([Order_OrderId]) REFERENCES [dbo].[Orders] ([OrderId])
ALTER TABLE [dbo].[OrderPayers] ADD CONSTRAINT [FK_dbo.OrderPayers_dbo.Orders_OrderId] FOREIGN KEY ([OrderId]) REFERENCES [dbo].[Orders] ([OrderId])
ALTER TABLE [dbo].[Orders] ADD CONSTRAINT [FK_dbo.Orders_dbo.OrderPayers_BaseOrderPayer_OrderId] FOREIGN KEY ([BaseOrderPayer_OrderId]) REFERENCES [dbo].[OrderPayers] ([OrderId])
but his SQL it doesn't even work
I can't insert Order because it need OrderPayer and vice versa :)
Is it possible to fix it according to my expectations ?
p.s.
the tables are very simplified, in fact they contain many other fields