Another common theme is protection. Since Peter is often a young superhero, Steve and Tony are constantly trying to protect him from various threats, both as his dads and as fellow heroes. For example, in many fics, they protect Peter from villains who might target him because of his powers or his connection to them. And also, growth is a common theme. Peter grows as a person, learning from Steve and Tony, and they also grow as parents.
One great 'stony adopt peter fanfiction' is 'A New Family' on FanFiction.net. It beautifully shows how Steve and Tony come together to adopt Peter. The story focuses on Peter adjusting to his new life with them and all the heartwarming and funny moments that come with it.
The theme of growth is also prevalent. Peter grows not only as a superhero but also as a person under Tony's influence. He learns new skills and also gains more confidence. At the same time, Tony also grows in his ability to care for someone in a father - son type of relationship. In some fanfictions, they both face challenges together which further strengthens their bond and shows their mutual growth.
Love is a big theme. The love between Steve and Tony which then extends to their relationship with Peter. There's also the theme of sacrifice. For example, one of them might have to sacrifice their career or certain personal goals to take care of the family. And finally, a sense of community within the Avengers is often explored. How their friends and fellow Avengers react and support them through this strange time in their lives.
The theme of friendship - turned - more - than - friendship is also quite prevalent. They start as comrades in the Avengers, but in many stony fanfictions, their bond deepens into a romantic or at least a very deep emotional connection. It's about how that transformation happens and what it means for both of them and the rest of the team.
One common theme is the exploration of their complex relationship. Since Steve and Tony have different personalities and ideologies, fanfictions often focus on how they navigate their differences and find a connection. Another theme is friendship and loyalty within the Avengers. Their relationship is often set against the backdrop of the team's dynamics.
Isolation is also a theme. Often, the character who is 'hurt' will isolate themselves from the other. Tony might lock himself away in his lab, thinking he doesn't deserve Steve's love or friendship after something has happened. This adds to the overall atmosphere of pain and the need for reconciliation in the fanfiction.
One common theme is the conflict of ideologies. Steve's more traditional view of freedom and Tony's more utilitarian approach often clash. Another theme is friendship and betrayal, as they were once allies and now are on opposite sides.
There are also a lot of 'fix - it' fics. These are stories where the writer tries to 'fix' the events in the movies that they didn't like, especially those that caused conflict between Steve and Tony. For example, after Civil War, many fics try to bring them back together in a more harmonious way.
Since I'm not overly familiar with 'stony bottom tony lemon' fanfiction, it's hard to say for sure. But perhaps themes like friendship, adventure, or self - discovery could be common. It really depends on the nature of the characters and the setting within this specific fanfiction area.
Often, there are themes related to how the relationship between Steve and Tony evolves during the pregnancy. It could involve increased protectiveness, deeper emotional bonds. And sometimes, there are themes about their future and how the pregnancy will change their lives and goals.