For Michael's family, if they have been in hiding or trying to keep a low profile in Roswell, the pregnancy could be a big threat to their secrecy. They might be hesitant to get involved for fear of attracting unwanted attention. Maria's family, being human, might have a hard time adjusting to the idea of having an alien - related pregnancy in the family. They could initially be resistant, but over time, with understanding and seeing Michael and Maria's commitment, they might come around.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Roswell fanfictions, including many about Michael and Maria. Another place is FanFiction.net. There are also some Roswell - focused fan communities on social media platforms like Tumblr, where users might share or recommend good Michael and Maria fanfictions.
One great michael and maria roswell fanfiction is 'The Unseen Bond'. It delves deep into their relationship, exploring how they deal with the challenges in Roswell. Another is 'Michael's Hidden Feelings' which focuses on Michael's inner thoughts regarding Maria. And 'Maria's Discovery' shows Maria finding out new aspects about Michael that she hadn't known before.
A possible plot could be that there's something special about the baby because of their alien heritage. Maybe the pregnancy progresses differently compared to a normal human pregnancy. They could discover that the baby has unique powers or abilities that start to show even before it's born. This would add an element of mystery and danger as they try to protect the unborn child from those who might want to use its powers for their own gain.
Rebekah's family has a long history of complex relationships. Her mother, if still around, might see the pregnancy as a way to strengthen their family's position in the supernatural world. However, some of her siblings like Kol might be jealous or feel left out. On Stefan's side, his vampire nature might make his family worry about the implications of having a half - vampire child. They would be concerned about how to raise a child in their world of danger and secrets.
Sirius's friends, like the Marauders, would be extremely shocked. They would probably be very concerned about Sirius as they know his feelings towards Bellatrix as an enemy. They might try to convince him to break away from the situation, thinking it's some sort of dark plot against him. James, in particular, would be very protective and would want to figure out what's really going on.
Tessa's family might be overjoyed at first. Her mother could start knitting baby clothes right away and her father might start planning how to convert a room into a nursery. They would offer a lot of advice based on their own experiences.
Gunther's family might be overjoyed. They could be very traditional and start preparing all kinds of old - family - recipe baby foods right away. Cece's family, on the other hand, might be a bit more cautious at first, but then quickly warm up to the idea and start knitting baby blankets.
The Stark family would likely be horrified at first. Sansa's father was beheaded by the Lannisters, and there is a long - standing feud between the two houses. Her brothers, if they were alive, would be very angry and might see it as a betrayal. The Lannisters, on the other hand, would also have a mixed reaction. Cersei would probably be furious, seeing it as a threat to her power and influence. Tyrion might be more understanding and could potentially try to mediate between the two families.
The Madoc side of Jude's family is complex. Madoc might see the pregnancy as an opportunity to gain more influence in Faerie. He could try to manipulate the situation to his advantage. But at the same time, he might also have some paternal instincts towards Jude and the unborn child, given his history with her.
Jacob's family might be initially shocked, especially if it was unexpected. But they would likely come around and be supportive. His parents might offer their wisdom on raising a child. Rosalie's family, depending on their nature in the fanfiction, could be either overjoyed or a bit more reserved. If they are more traditional, they might have concerns about the relationship between Jacob and Rosalie.