I think, IMO, there was a reason QX mentioned the detail where "DV would often pick up Maleah and take her back to the house without her knowing". Out of all the comments he would make, QX had this in his mind to make public. I believe there is a reason he mentioned this.
I later do not want to hear BB didn't know Miss Maleah was brought back from day care on the same day BB was to leave, because BB knew DV DID IT OFTEN. Do not act shocked or surprised when you are aware of something that happens often.
And, QX stated DV stopped communicating with BB the day after BB returned. In order to 'stop', there had to be a start.