based on the fact that the dealer made the decision and nobody contested at that point in time the raise is allowed. If the 3 to act after her raise we'll say for example called and the guy contests what happened, it's basically an advantage to him. Let's say he has Aces. 3 players call the 1k making it a 4k pot. He's obviously not going to contest then. But if he wants to see a cheap flop then say something? No it doesn't work like that