Come on bro, you don't think the woman can put on act before marrying? She will be on her best behaviour, look the best, act the best, tell you whatever you want to hear to seduce you into marriage. After the legal document is signed, a few months or a few years in, she will start to introduce change in the relationship, expect more while offering less. And then if she wants out, everything you told her during the marriage "to be intimate, to be one, to fight life's struggles, to create a close knit loving family," will be used to absolutely destroy you.
All girls are actresses, they don't care about marriage or the man they are marrying, they care about their image and what they can get out of it.