It's wrong to marry someone you don't love
Philip just had a one night stand with Alexis, who he doesn't really like very much, but it turns out he got her pregnant, so he wants to take responsibility.
Philip wants to be in his child's life.
Philip and Alexis decide to work on having a friendship for the sake of their child.
Philip proposes to Alexis, and the two of them become husband and wife and move in together.
Philip and Alexis find a mutual respect for one another and are able to co-parent effectively.
The marriage makes Philip and Alexis both miserable, because there was never any real connection.