Sentence:  But the terms normally used to distinguish a man&#39;s resident and absent children are "inside" and "outside," the reference being to the home where the common father dwells. Only rarely will a man describe his "<WSD>inside</WSD>" children born out of out of wedlock as "lawful," [...] 
Meaning of the word marked with <WSD> tags:  Legally married to or related to (e.g. born in wedlock to), and/or residing with, a specified other person (parent, child, or partner);  existing between two such people.