Your Excellency @ Rajnikath
The queriest is Alfa Male.
1. The first relationship was live-in and is over with occasional marking territory visits (social monogamy) that also when she (rarely) calls him (child birth was one fact here) now-a-days.
2. The second one spotted him in office and not otherway around it is written as his own fact re-read it and they started monogamous relationship.
3. The first one who had live-in is not expecting anything from him now when second one legally entered his life.
4. The second one is on mission to control him as her only playmate and thus "black mailing" him with threat of bigamy which is not provable at all and anyhow live-in that he had prior to marriage is perfectly legal as per facts of this query.
5. He left first one which was live-in on call of second one with whom he has legal marriage.
What does monogamy means dear Rajnikath now pick up best dictionary in market and discover yourself in context to this query.
monogamy = In current context usage monogamy is refered to having one s*xual partner irrespective of marriage or reproduction.
Now did you get my mind which I applied to this query:-)
