40 ILCS 5/19-115
When any contributor to said fund, who has been in the service of the house of correction for a period of 20 years, has contributed to said fund for the same period and has retired and become a beneficiary under "The 1911 Act" or this Division, shall then marry, such wife of such marriage shall after his death receive no benefit nor annuity from said fund.
Any widow or child or children receiving benefits or annuities, under "The 1911 Act", shall continue to receive such benefits or annuities, which shall be increased from $480 per year to not more than $720 per year and paid in accordance with the provisions of Section 19--110 of this Division.
The term "child" or "children" under this Division shall not include adopted child or children, nor shall it include a stepchild or stepchildren of any contributor to aforesaid pension fund.
40 ILCS 5/19-115