If you filed a cross complaint then they have to answer or you default them.
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The partnership issue is not in her favor, it does not excuse her from answering the complaint. In fact, if you get a default against her you it may result in your obtaining your damages from the other defendant (depending on the "partnership"). You should file your default. However, keep in mind that defaults are pretty easy to set aside.
The court will require you to take the cross-defendant's default. If you don't, an OSC will be issued against you to show why you haven't.
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