In the end in the movie Problematic Twins it returns "aserlo" with his husband.
After the twins won, "alos I" erased the memories.
Her sister Trudy's last name is Vanderhoug (Operation: Nano Spiez), and since she doesn't seem to be married, that could possibly be her maiden name. Also, since Vanderhoug is a Dutch name, it could be possible that she is of Dutch origin, along with her kids.
She is a real estate agent.