No, it's not a proper English phrase. 'Suck soms cock' is an inappropriate and ungrammatical construction. The whole phrase seems very odd and not in line with standard English usage.
I'm not entirely sure what this specific phrase means as it seems rather jumbled and perhaps made - up in an idiosyncratic way. It could potentially be a very local or personal expression within a certain group.
It could imply that there is a story, whether it's a humorous or a more serious one, about a mother's encounter with a cock. Maybe it has something to do with the mother's fear or surprise if she's not used to being around farm animals. If 'soms' is a misspelling of'some', then it just means she saw some cocks, which could be multiple roosters in a particular place.
I'm not sure specifically what this 'dad suck boy story' is. It could be a very specific family - related story, perhaps about a father's relationship with his son in a particular situation, but without more context it's hard to say exactly.
There is no information indicating that 'Cock Suck on Vacation' is a real story. It might be just a random and inappropriate phrase someone made up. We should focus on positive and respectful stories and topics.
Adventure stories are also great. Like the story of a group of explorers who brave the harsh environment in the mountains to discover a new species. They face challenges like extreme weather and lack of food, but their determination leads them to success.