re: "One of my client is asking to do the work and she is saying that after I do some part of the work, then she'll send me a contract."
Well, no, this is NOT "one of your clients." This is a prospective client who has talked to you about her project. But this is NOT your client.
If there is no contract, this is not your client, and you should not do any work.
If she says that you should do part of the work, and then she will send you a contract, then she is violating Upwork ToS. She is asking you to work for free.
re: "Should I continue the work?"
Of course you should not continue the work.
You should not have started the work at all.
re: "Or is she a fraud?"
It doesn't matter if she is a fraud or not.
You can't get paid without a contract.
You should not start working without a contract.
re: "Please guide me what should I do?"
Don't argue with her. Just tell her that you will be happy to start working on the project after a contract is in place.
If she does not make a contract, then IGNORE everything she says until a contract is in place. Don't answer questions. Don't engage in conversation. She needs to set up a contract.
