Jasmine, 34 took to Instagram to share a picture of the happy couple attending a friend’s wedding in Rottnest Island in Western Australia.
'Congratulations to Jack & Sofia! We [love emojis] you!' she captioned the image.
However, fans were sent into a tailspin over Jasmine’s stomach-obscuring dress.
'Baby bump? She looks preg thou if yes omg how gorgeous!!! Congratulations then [sic],’ wrote one excited fan.
'Is that a baby bump?' asked another.
Karl confirmed his engagement to Jasmine in February this year, telling Channel Nine's The Fix they are both 'very happy'.