One night stand with the boy next door

Evelyn's life changed when a hot sexy neighbor moved into the apartment next to hers, Walt Andrews. A divorcee and an ex-mafia boss. Her only aim in life was to work hard to be a strong and independent lady, so she could bring her parents' killers to book and take revenge like she promised them on their deathbeds.
She had a one-night stand with the boy next door, Walt Andrews, and got pregnant for him. They both agreed and signed a contract to get married for One year for the Child's sake, plus Walt was willing to help Evelyn with her revenge.
But what happens when Evelyn finds out that Walt Andrews had once been married and had two children from two different women??
How would she face the truth when she learns about the real reason why Walt Andrews married her??
And what would happen when she finds out that the man she has been married to was once a Mafia boss??