 Do you think that's what she wants? 
( ( ( Do you ) ( think ( that ( 's ( what ( she wants ) ) ) ) ) ) ? )
(ROOT (SQ (VBP Do) (NP (PRP you)) (VP (VB think) (SBAR (IN that) (S (VP (VBZ 's) (SBAR (WHNP (WP what)) (S (NP (PRP she)) (VP (VBZ wants)))))))) (. ?)))
You and I are questioning whether it is what she wants or not.
( ( ( You and ) I ) ( ( are ( questioning ( ( ( whether ( it ( is ( what ( she wants ) ) ) ) ) or ) not ) ) ) . ) )
(ROOT (S (NP (PRP You) (CC and) (PRP I)) (VP (VBP are) (VP (VBG questioning) (SBAR (IN whether) (S (NP (PRP it)) (VP (VBZ is) (SBAR (WHNP (WP what)) (S (NP (PRP she)) (VP (VBZ wants)))))) (CC or) (RB not)))) (. .)))