Millicent de Gournay, Lady Cauntelo - Died 1232-1233?

Many cite 1260 for her date of death
Ancestral Roots of Certain American Colonists Who Came to America Before 1700
Author: Weis, Frederick Lewis Date of Publication: 2004
Ancestral Lines PG 245 that Millicent de Gournay d. 1260.

Medlands states Milicent de Gournay was the 1st wife and her husband remarried before 28 Aug 1236
https://fmg.ac/Projects/MedLands/ENGLISHNOBILITYMEDIEVAL3.htm#Willi...
 i. WILLIAM [III] de Cauntelo, son of WILLIAM [II] de Cauntelo & his wife --- (-1251).
             m [firstly] ([15 Mar 1217]) as her second husband, MELISENDE de Gournay, widow of AMAURY [VI] de Montfort Comte d’Evreux, daughter of HUGUES [V] Seigneur de Gournay &  his wife [Juliane de Dammartin].
            [m secondly (before 28 Aug 1236) ---, daughter of THOMAS FitzAnthony & his wife ---.

Richardson states Milicent de Gournay was the 1st wife and her husband remarried after 1232
https://soc.history.medieval.narkive.com/pIcw3ChP/parentage-of-sir-...
Douglas Richardson,
CANTELOWE FAMILY
1. WILLIAM DE CANTELOWE, married _____.
2. WALTER DE CANTELOWE, living 1216, married AMICE _____.
3. WILLIAM DE CANTELOWE, died 1239, married MASCELINE (or
MAZRA) DE BRACY.
4. WILLIAM DE CANTELOWE, Knt., died 1251, married (1st) c.
1215/6 MILICENT DE GOURNAY; (2nd) after 1232 MAUD FITZ GEOFFREY, died
1261.

States Milicent de Gournay died before 29 Sept 1233
https://our-royal-titled-noble-and-commoner-ancestors.com/p225.htm#...
Milicent de Gournay1,2,3,4,5      
Last Edited      
4 Apr 2020  
F, #6734, b. circa 1185, d. before 29 September 1233    
CITES  Douglas Richardson, Royal Ancestry, Vol. II, p. 78-79 that she died before 29 September 1233.

It would seem her date of death could be narrowed to 1232-1233?