This was so much fun to read, especially since the summary had made me doubtful. Luckily, the title and the whole proverb along with the warning for "awkward sex between middle-aged wizards" allured me to proceed, otherwise I would have missed a wonderful story.:)
It was a brilliant idea to make Harry pregnant so soon and unexpectedly, so that he and Snape couldn't dwell too long on their old issues, though forced to live together.
I loved reading about the pregnancy and how Regulus helped his fathers to understand fatherhood, each other and love. The father-son discussion between Harry and Al and the scene leading to belly-touching by Snape were particularly beautiful and very moving in a non-sugary way.
The combination of humour and seriousness worked really well throughout this story and the sex was amazing. I was anticipating funny fumbling but I never expected to get hot and sweet, too. "Plenty of time" was perfect ending.