I found baptisms for 3 children of Maurice Sullivan and Mary (Maria) Lalor at Abbeydorney Parish, Kerry:
David 17 Mar 1838
Bridget 17 Jan 1841
Maurice (Maurtuis) 5 Aug 1843
There is a break in the register from 1844 - 1851 so any children baptised during those years won’t be found.
I did not find a marriage record for Maurice and Mary. Marriage records for Abbeydorney Parish start in Oct 1835.
You can look at the registers on this site:https://registers.nli.ie/parishes/0645