Well I don't even know if this tweet refers to Donald Jnr, but on August 19th Oday says " Get over your past. Put it in the sea of forgetfulness. ‘for my own sake i don’t even remember’. You cannot remain pure if you retain your sin in your hand.
it’s either finished or it’s not finished. Put the guilt to bed. Let there be light." That's one way of referring to a past relationship but I guess it could be someone else she is making this subtle aside to.