Diane would probably be overjoyed. She's always been close to Meliodas and Elizabeth, and she would likely offer to protect them and help out in any way she can. Maybe she'd use her giant strength to build a special place for them to stay during the pregnancy.
Their pirate friends would probably be both excited and a bit clueless. Jack Sparrow might try to give the baby some 'unique' gifts like a small piece of treasure or a strange trinket. Gibbs would offer practical advice on how to keep the baby safe on a ship if they ever take it to sea.
Ban would probably be excited and start thinking about all the fun things he could teach the baby, like how to steal food without getting caught in a humorous way. King might be a bit more reserved at first but then offer to make the most beautiful crib with his powers. Diane would be super excited and offer to babysit all the time, cooing over how cute the baby will be.
Often, there's the theme of overcoming obstacles. Maybe there are external factors like friends or family not approving, or internal issues like one of them being afraid of commitment. But in the end, they overcome these and share a passionate kiss. In some fanfictions, the kiss could also be a part of a grander romantic gesture, like in a beautifully decorated setting on a special occasion.
There could be various scenarios in such a fanfiction. Maybe it happens during a moment of celebration. For example, after a big success of one of Austin's concerts that Trish and Dez helped organize. The excitement of the moment gets to them and they share a spontaneous kiss.
One possible plot could be about how Trish and Dez handle the unexpected pregnancy. They might initially be in shock but then gradually come to terms with it. Maybe they start preparing for the baby, from decorating the nursery to attending parenting classes.
You can try fanfiction platforms like Archive of Our Own (AO3) or FanFiction.net. Just use the search terms 'Dez and Austin kiss' on their search bars, and it should show relevant stories.
It could be about two friends, Dez and Austin, who finally realize their hidden feelings for each other during a moment of high emotion, like after a big performance, and then share a passionate kiss.
She likely responds with anger. Elizabeth values her independence and freedom to choose. If Mr Darcy forces her, she may lash out at him verbally, stating that his actions are unjust and against her principles. Given her sharp wit, she would use her words to make him understand that she is not a possession to be claimed through force.
Their friends could be great supporting characters. For example, a really close friend who is always there to give advice, whether it's about pregnancy cravings or baby names. Another could be a more practical friend who helps them set up the baby's room.