Form E

I have already posted but thought it best to post here as it relates to financial disclosure. My wife and I exchanged Form E yesterday and she has told a blatant lie. She claims she owes £300,000. I know this is not true and she paid back this loan when her uncle passed away. I also remember it was for £350,000. However, the £50,000 was loaned a year later. Her uncle also loaned her money to purchase a vintage caravan. She told me it was more of a gift and she would only be paying a nominal amount back to him. She pays £10 a month to his wife. So she is claiming this £10 is to pay back the £300,000. She has calculated the months and deducted that from the £300,000. She is claiming she still owes £298440. I am shocked, angry , hurt and amazed that she has lied. I think she has forgotten that she told me she had to pay it in full when he died. It was quite complicated. I seem to recall she was gifted £300,000 from his wife , then she paid it back to her.  She also did not disclose her credit card statements yet she pays the balance in full every month. She pays money into a savings account that she has not disclosed. She states she wants to sell the marital home so we can buy something each which I was quite shocked about. She also wants me to sell my flat    which I kept and have a clean break. She has an investment property as well. I found paper work that she has another credit card which she has not disclosed. I feel very confused . Is she really that stupid to lie and think she will get away with it or is she planning something/backup plan? it is all so deceitful I cannot get my head round it.