Having just come out of long-term relationships, they weren't chasing anything serious.
So when Tessa's suspected food poisoning turned out to be pregnancy not long into their mutually beneficial arrangement, it was a shock.
"I remember bursting into tears, getting straight in my car to go to my friend's place where I walked in the door and threw the test on the table and just cried," 27-year-old Tessa of Sorrento, Victoria says.
"It was definitely not on my agenda."