.. copy and pasted from the stupendous website.. called.. "We Vikings".. an excerpt from their english translation of the "Lokasenna" .. I turns out the Sif and Loki are very good friends..

Then Sif came forth, and poured out mead for Loki in an icy cup, saying: 53 Hail to thee, Loki! and this cool cup receive, full of old mead: at least me alone, among the blameless Æsir race, leave stainless. He took the horn, drank, and said: 54 So alone shouldst thou be, hadst thou strict and prudent been towards thy mate; but one I know, and, I think, know him well, a favoured rival of Hlorridi, and that is the wily Loki.