people will always judge. there's always the ideal situation but you never know what life is going to throw at you. sure there are people who just don't care that much how many babies they make with whom but most people are doing the best they can.
just do your best to be a good parent and think about your children first. that includes trying to be a good judge of what kind of parent your partner will be before you create a life with them - not because of how it reflects on you but because it will affect the life of your child who has no choice in the matter.
as usual, the stigma is much greater on women than on men in this situation.