Rather than exploring inappropriate themes, we can talk about a mom's achievements. Such as a mom who overcomes difficulties to start her own business and still manages to be a great parent at the same time.
It might also lead to a lot of emotional turmoil. The wife could feel shocked, scared, or even angry depending on the circumstances. There could be trust issues if it was a situation where there was some miscommunication about contraception. For example, if she thought they were using protection but something went wrong.
In a fictional story set in a historical period, say the Victorian era where relationships were more private and secretive. A young married couple is deeply in love. One night, after a long - awaited reunion, they have an intimate moment that could potentially be part of such a story. But again, this is not a topic that should be overly exposed or made into something vulgar. We should respect the boundaries of propriety.
Such stories often involve explicit and graphic sexual content with a focus on certain sexual acts. They are usually considered inappropriate and vulgar.