1900 census at Reedsburg, Sauk WI shows John F. Ihde, b. Nov 1856, 50, married 14 years, b. GERMANY, parents b. GERMANY,immigrated 1869, mason; Louise, b. Jan 1846, 54, married 14 years, 5 children born/ 3 living, b. GERMANY, parents b. GERMANY; children b. WI: Emma, b. Oct 187, 27; Louise, b. Dec 1884, 15. Also enumerated is Grace Buelow, boarder, b. Sep 1885, 14.
The 1900 census record is very clear where it is recorded that John and Louise have been married only 14 years. By 1910 John has died so we don't have the record of the number of marriages he has had. Therefore it is unclear whether Louise is the mother of Emma and Louise or if the census enumerator made a mistake.