Slavery and freedom

From moral justification view, this verse about slavery is concerning to me, not really about the slavery, it's about the wife and children of a few slave that are left behind when he's freed. It states this in the verse >If his master gave him a wife while he was a slave and they had sons or daughters, then only the man will be free in the seventh year, but his wife and children will still belong to his master. [ ‭Exodus 21:4 NLT‬] My questions are: 1. Would the kids continue as slaves for the master? 2. When the wife needs her conjugal rights, what should happen?