The couple welcomed their first child, North West, in June and their little girl has made them both feel more secure about their relationship.
A source close to the couple told People magazine: ''They look good together now. Five months ago, when they were in Paris, they didn't act like a real couple. Now they have a body language that they didn't have before North was born.
''They are in it for the long haul.''
The insider said that the couple made the difficult decision not to bring their daughter overseas for their recent trip to Paris Fashion Week because they wanted to enjoy some quality time alone together.
The source added: ''Especially with Kanye's tour coming up, they want to be together as much as they can.''
The duo are still living with Kim's family in Calabasas, California, as renovations continue on their new $9 million home in Bel Air, and the rapper is said to be more comfortable than ever around his girlfriend's family.
The source said: ''He's actually having a good time with Kim's family. He gets along really well with them.''
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