Seebohm also posted a cryptic tweet, which many assumed was directed towards .Larkin and suggested that the details of their break up will soon become public.
'I'm over the drama you created. Now you can deal with what comes next,' she wrote in a since-deleted Tweet.
Seebohm reportedly discovered details of Larkin's alleged affair on July 12, and the two immediately called off the relationship.
The following day, Seebohm announced the news on Instagram.
'I would like to take this opportunity before more speculation and rumours are spread,' she wrote.
'Due to current events that have occurred, Mitch Larkin and I have decided to end our relationship and go our separate ways.
'As always I appreciate your support and ask for your understanding and privacy on this matter,' she said.
The swim star couple had bought a house together in Brisbane late last year.
Mitch is yet to comment on the split.