It would appear that the only source for this marriage and the children is the IGI. It needs to be checked. it does not look like the IGI entry is an LDS extraction. It is also odd that Ken Gigg didn't find these entries, since he obviously found other Loveluck baptisms in East Grafton PR 1846-1863. There is also a conflict with Gwen's fragment 10.
Graham 22 Sep 2017: Findmypast transcription confirms that we have the correct match.