She is married to Arnoul III de Walhain.
They got married
--- de Warfusée . Jacques de Hemricourt names “Rasses sires de Warfezéez et de Domartien, ly secons...Thomas...sires de Hermolles, le tiers...Ernus sires de Harduemont, de Hautepenne et d’Awir, et ly quatrieme...Istasse...sires de Nœf-chasteal en la terre de Dollehain et de Hanueffe...et...une sereur mariée a Walhen” as the five children of Otton, a later passage stating that the daughter married “en Braybant al saingnor de Walhehain...bannerez”[1360]. m ARNOUL [III] Seigneur de Walhain, son of GUILLAUME de Walhain & his wife --- (-after 13 Jul 1233).
https://fmg.ac/Projects/MedLands/LOTHARINGIAN%20(LOWER)%20NOBILITY.htm#dauOttonWarfuseeMWalhain