Continuity mistake: Colonel Mustard pours everyone a drink, he puts the whisky on the table and in the next shot the glass he poured whisky in is in his hand without enough time to pick it up. (00:41:15)
Continuity mistake: When the Cook's body falls out of the freezer on Mr. Green, he is pushed onto the floor. In the next shot, he is standing back up again. (00:33:20)
Continuity mistake: When the 1st chandelier fell, we see Peacock and White are standing near the front door. Scarlet then says "look!" Bringing everyone to look at the dead motorist in the study. Peacock and White are suddenly teleported to the study door behind Scarlet, even though they were quite far away with even a couple steps to climb down.
Continuity mistake: In the beginning when Col Mustard shows up, the butler shows him to the library, you can see that door to the library is open. When the scene shifts Wadsworth is opening the door. (00:05:30)
Answer: No, Mrs. White was not in love with Wadsworth. She may have been slightly physically attracted to him at the time of the "hanky incident", but it is more likely that she only felt sympathy for this poor man. As for the playing with the tie incident, she only did that so he would let her out.