...thats not Rei, can't you guys even tell Yui from Rei. Admittedly I like that who ever colored this made Yui's hair blue like Rei's. In the manga Yui's hair is alot more like Rei's unlike where in the anime she has that hair style that was later copied by Watsuki for one of the Kenshin villians.
...Of course thats Gendo in the background, he is Yui's husband. This is from the "bread univers" (named after Rei's piece pf toast), from Evangelion manga, Shinji's dream world.
