Erotic games can backfire

I AM in my early 40s and so is my husband, a loving man who used to take me for holidays. We would go to my elder sister’s house in Malacca. My sister, a schoolteacher, is in her late 40s. She is married to an executive in a private company.
During a week-long visit, my husband told me that my brother-in-law had a liking for me. He said the latter had suggested swapping wives and my husband agreed. He wanted me to agree, too.
Hubby told me my sister was okay with the idea and kept pushing me till I gave in. The next day, I felt guilty when I saw my sister, but she said she had a wonderful time with my husband. Later in the day, my husband also said that he had enjoyed himself with her.
The problem is, I enjoyed myself too, although I had been scared at first. I was excited and deep down, I was looking forward to more. Is it normal? Since then, I’ve been asking my husband to find new partners to do it with.
Worried

YOU are caught in a web of self-deceit and unhealthy sex. Swapping partners and enjoying it can spell trouble and emotional trauma when it gets out of control.
Getting into erotic sex may seem exciting and thrilling. You tell yourself that you were coerced into it, hence you are not to be blamed. You feel guilty for enjoying such illicit sex, yet you burn with excitement and new-found passion. It’s even better because all the parties involved are people you know and love.
You want to be told that there is nothing wrong with having sex with multiple partners. This is lying to yourself because you know that sex with different partners can never bring you true happiness and emotional fulfilment. What happens if you should fall in love with your brother-in-law? How would you feel if your husband called out your sister’s name while he is in your arms?
Don’t encourage such games as you can get hurt badly. Suspicion and feelings of betrayal will creep in to destroy the harmony of love and marriage. If you have children, how can you explain such behaviour? Can you honestly say that it’s normal to sleep around indiscriminately to satisfy such base, animal instincts?
Be honest with yourself and you will know right from wrong. No one can tell you how to live your life. It’s always your choice and the consequences are yours to bear.