By that time, Sue would actually exist, but as a babu.(Lux 21, Lucas 19, Star also 19, and as we know, Faith 7.) So you can imagine how protective Dream would be over him after so damning long
If any of you have the question of how long Dream has been separated from Cross and their kids for(in my version of fnaf-)... The answer is...
5 F**KING YEARS.
Once Dream got to see Faith again after so long(by the time he got to see him, he has actually almost forgotten how to be a parent-) he recognized him after a minute, and went full parent mode again.