When to apply for Visitor Extension?

[US2CanApp]

Hello.

My wife is here from the United States. Applying Outland Spousal next week. When should we apply for a visitor extension (after submit Outland Sousal application, or more closer to when 6 months up)?

Thank you.

 

[scylla]

Hello.

My wife is here from the United States. Applying Outland Spousal next week. When should we apply for a visitor extension (after submit Outland Sousal application, or more closer to when 6 months up)?

Thank you.

The second.