“In Edisbury v. Edisbury, 2022 ONSC 2407, starting at para. 33, Finlayson J. described the test to vary an interim support order:
(a) whether there is a strong prima facie case that there has been a material change in circumstances since the time of the order in question;
(b) whether there is a clear case of hardship.
(c) whether there is a situation of urgency; and
(d) whether the moving party comes to court with “clean hands”.”