All children of a woman who has been married, born within 10 months after the dissolution of the woman's marriage, are presumed to be legitimate children of that marriage.
Mont. Code Ann. § 40-6-202
Legitimacy of children born after dissolution of marriage
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.