The reality TV personality then shared a beaming selfie with her equally beaming artist fiancee who donned a Santa hat.
The couple went public with their relationship in May.
The announcement came just two months after Melissa announced the end of her "marriage" to MAFS spouse, John Robertson.
At the time the news came as a huge shock to fans.
"It has been a very difficult decision and it makes us both very sad to say we have decided to no longer continue as a couple," they said in a statement.
"We still care deeply for each other as friends and will never forget the incredible times we have had together."