I didn't say I was perfect. I do know if I was big belly, I'd not be prancing down the aisle in a white dress so big and proud.
You summarized things very well. These women are FLAUNTING the fact that they're pregnant and walking down the aisle. They are expecting that all the invitees to their wedding will be accepting of their premarital sex and will be happy to "celebrate" the pregnancy and then the wedding, in that order.
But God calls sex outside of marriage a sin (fornication). I am not perfect either, lest anyone criticize me. But I think these people are just mocking God by going against His rules and then asking for His blessing, knowing full well that He is not pleased.