Carl Gustaf XVI has three children: Victoria, Carl Philip and Madeleine.
Agnatic primogeniture was law when Victoria (b. 1977) then Carl Philip (b. 1979) were born. Six months after Carl Philip's birth, Parliament voted through an amendment to the constitution, making primogeniture absolute and backdating the amendment, so Victoria became Crown Princess.
It is said Carl Gustaf was furious, and Carl Philip has been given appointments which traditionally were attached to the heir.
Victoria developed an eating disorder when she was a teenager and while in recovery, met Daniel (her now-husband) at his gym. Daniel is said to have aided her recovery. There was disapproval about this relationship, not least of which came from the king. A country-born gym owner/trainer? My pearls! Victoria and Daniel dated for eight years (rumours of a brief breakup a couple of years in) before finally being given approval to marry, which they did in 2010 (their wedding is a beautiful thing to watch). They have since had two children, Estelle (Victoria's heir) and Oscar.
Carl Philip dated a friend of his sister's for about a decade, before leaving her and getting together with a one-time reality star, Sofia, who had a nude photoshoot when she was a teenager in Asia (her parents travelled with her), kissed a porn star on television, made jokes about disabled people, wrote on a blog about how she and her then-boyfriend tried to convince the other to out of bed to see to the boyfriend's young child and so on. Sofia's image has had an overhaul since their marriage. They have three sweet little boys.
Madeleine was seen as a party princess, had many gossip columns devoted to her, following her every move and insinuating all sorts, and a broken engagement. She is married to Chris, a British-American businessman, and lives in Florida with their three children privately. Chris turned down a title upon marriage. It is said they were aware they wouldn't be needed with the oncoming generation, and Chris makes good money, so they were happy to do their own thing. She uses a public instagram, acknowledging birthdays of her children and the Swedish RF, important dates in the Swedish calendar, and works with Queen Silvia for the charity Childhood.
[I am aware I've left bits and pieces out, but trying to not write a thesis. Have also tried to be as accurate as I can, having been 'royal watching' the SRF since before 2010. If you're interested further, look them up. Victoria & Daniel are
]