Need help to take express myself and take a decision

Currently I am at a stage where I am confused where I would go and can i turn out to be a complete sub husband and cuckold. The write up is bit long just to put my point so I can get the right help.

Prelude:
 

I and my fiancé are in a relationship since 8 years. I was her 1st boyfriend. We were plain friends till 1^st two years and gradually got attracted towards each and kissed for the first time. Thereafter the relationship grew and we got engaged and would be getting married after 3 months. We have been formally engaged since one year now. I knew her as a girl who was very ambitious and hence much disciplined about her studies. She finished her studies well and ended up in a high paying job as an investment banker. Gradually as she moved up in life she had a better control on all and she cherished decision making. Things started going as she said not just coz she was now well paid but she could lead people. I always thought myself to be dominant boy but as I closely observed myself I noted that right from my childhood any women, be it my mother, sister, aunts, and cousins could emotionally alter my decision. With my fiancé it became no different. I was short termed and she would gradually calm me down and exercise control. 

My Fantasy:

My fantasy to initially start with 3 years back was be cuckolded which later added fantasies of being a sub husband doing household work and might be cross-dressing. My experience to this lifestyle was purely internet and hence initially I though of it just as a fantasy which I enjoyed. But it gradually increased to a point where I accepted I am a weak male and somehow I enjoy being weak. It came to a point where I become jobless and I tell my fiancé I won’t be able to manage this after marriage and she pats my shoulder to assure that she would lead the house. She was true to her emotions and I have no second thoughts that she loves me just for being with me. But she did welcome the opportunity to exercise more control. Few days later out of frustration and also some hope I tell her till I get a new job I shall manage the house. She would be happy as she had never liked house chores. Slowly these discussions would start building and lovingly she would make me arrange and run the house and what her daily schedule would be. I would be loving it always but never display it. While shopping I start carrying her bags and slowly she naturally starts giving me the bags. A lot of times I also was with her hand bag and more I help her this way the more she use to blush and pamper me. 
 

Now regarding my cuckolding, she always fantasies of tall sleek guys. We both are 5’6. She is 24 yrs old, a 28waist fair and sleek. I am  32years, 34waist whitish with glasses. She never had a boyfriend and hence she did say jokingly that one extra marital affair is justified. I would say go on, but she says its just a fantasy and she loves me. In between when I was out of the town I read one of her chats through her laptop. It gives me a picture that she was out with one of her male colleague where they were to a beach, bar and cab and they kissed at least 4 times and twice he grabbed her boobs. I confront her but overall I could not keep my emotions intact and the discussion got rued. After that she goes into a shell and would not be expressive with her fantasies. Last 4 months she would be extra intimate, much bolder with her dressing as well as pampering me. I would again pick the bags and she would blush and one more time she mentions she wants an affair again to close it as a joke. She calls me uncle lot more for my tummy and my short height and now I rarely get angry.

But I could never confess fully that I want to be a cuckold or sub husband because I don’t want to give her a message that I hate house responsibility and I am lazy which I am not. I want this for her to choose this lifestyle and me supporting?

Notes about us:

1. we are an extremely loving couple and neither are bored of each other.

2. neither of us is scared to lose each other.

What should do and what are my chances?