Assalamu Alaikum, Brother and Sisters.
Here is the whole story: I got engaged about 5 months ago. Then me and my fiancee did zina several times. Our families did not know that we were doing that behind their watch. Both of us also requested our parents several times to arrange our marriage (the time before we had sex). But they disagreed, because our education was not finish yet and specially mine. Though I was and am still doing a contractual job. Our parents decided that we can marry each other after my sister come from abroad along with her husband and children. We had wait till that. So, we couldn't control ourselves and had zina several times. But after a few days, both of us thought that it was not right and we got married with the help and presence of some of our friends. But they didn't know that we had sex before. After a few days, both of us informed our parents that we got married and though they were anger at the start, they agreed and compromised with our doing. But still they don't know that we had sex before marriage. So, the question is if the Marriage is valid? Can't we repent after marriage? or by anyhow?