We should avoid such inappropriate topics. Instead, we could focus on positive family stories like 'times when mom showed great kindness' or 'instances of mom's selfless love'.
Yes, some classic novels might allude to such relationships in a very veiled way. For example, in certain works where the relationship between a husband and wife is explored deeply, there could be implications of such intimacies. But it's not often explicitly stated as 'blowjob from wife stories' because of the propriety of the literary world.
This idea is extremely inappropriate because it involves incestuous and vulgar content. Incest is a major taboo in most cultures and moral systems. Fanfic should focus on positive, creative and ethical storylines, rather than creating such disturbing and immoral scenarios.
Rather than this, we could discuss first volunteer experiences. It's a much more positive and acceptable topic to share. For example, the first time helping at a local shelter and how it made you feel great about giving back to the community.
We can learn about the importance of communication. In these stories, often if things go well, it's because there was good communication between the parties involved.