The admission came in the form of a very subtly placed comment on a Buzzfeed article titled: "25 Reasons People Gave For Cheating That Are, Somehow, More Disrespectful Than The Act Of Cheating".
Sam tagged Sasha's most recent ex Tori May with this scathing response: "@_torimay_ he once said Instagram must have hacked his account," she began, "that's why he had followed and messaged all these girls."
Tori, 40, broke up with Sasha, 33, earlier this year. She responded to Sam's scathing comment with: "@fro01 omg what. Master of lies and manipulation. The lies he told me still blow my mind."
While neither girl mention Sasha's name directly, it is pretty obvious who they are talking about...
Sasha and Sam split in 2016, after dating for 18 months following his win on her season of The Bachelorette in 2015.
In May, 2017, he told The Daily Telegraph that the break up had left him "absolutely heartbroken".
Sasha went on to date Tori during months following his split from Sam in 2016.
Sam has been dating 27-year-old navy clearance diver Dave Bashford since 2017, after being friends for a long time.