The 20-year-old influencer opened up to Yahoo Lifestyle about the photos, which emerged just one day after she made her romance with Billy Instagram official.
"Billy contacted me as soon as it happened," she told Yahoo, adding she was told it was a harmless, "fun" peck rather than a sensuous kiss.
But Lily wasn't letting her reality star beau off the hook completely.
"He'll still be sleeping on the couch for a few days, but I know there was nothing behind it."
Billy and Lauren's steamy smooch comes after Billy confirmed to Daily Mail Australia that the pair had enjoyed a secret tryst in early February, but end things because they live long distance.
Lauren has remained silent on the subject so far, instead posting a fun Instagram photo from Saturday night with her MAFS co-star Bronson Norrish and a Channel 9 producer.