Hello back, Kloumann
1901 FamSearch transcription had her as Fred's sister, not in-law. Saw that Annie's name was Young at marriage. Shouldn't assume, so... Thanks for looking it up & correcting my error.
adding: ( Was wondering how I missed her as claimed in the tree. See now that the tree owner attached the census but did not tag the source link to it in her details, so that it would show up as such.)