work wife
n.β Β«Almost one in five (of 2000) respondents said they had a work husband or wife, with a quarter of chief executives who contributed to the research identifying with having a work spouse. “Weβre talking about non-sexual relationships.…Weβre talking very much about intimate relationships in the true meaning of the word intimate.”Β» ββLove your work” by Pip Cummings Sydney Morning Herald (Australia) Aug. 27, 2005. (source: Double-Tongued Dictionary)