(Timeline: before running from Logstedseire)Tommy fails to escape Dream's manipulations in exile and is fully under the influence of Dream. To show his control Dream cuts a smile into Tommy's face (Jeff The Killer style) and Tommy accepts it as part of him. After telling Tubbo that Tommy has learned his lesson and should be un-exiled, Tubbo sees what Dream has done to Tommy and now regrets what he did and wishes to be able to go back in time. (Tommy now resents Tubbo, and wants nothing to do with him or L'Manburg)
Sorry for mistakes