No, Sam’s birth circumstances are less than optimal, but so are many others. Check out illegitimacy rates among statistical cohorts.
However, think of your own upbringing: you likely had aunts, uncles, grandparents, cousins, and FAMILY farther out than just your nuclear family/household. IMHO, the ultimate adolescent relationship is that with the grandparents: both are in physiological transition, and, while the grandparents are getting over “empty nesting”, they are rejuvenated in support of grandchildren and have much wisdom and sympathy to pass along.
A boy especially needs the strong role of a father in his life who has a clue about what’s right and what’s wrong. Sam will not have that and will no doubt have to wrestle with loving his lesbian mothers against hating what they are or hating those that condemn them. If the latter then post #329 will apply and his soul will be forever lost.