When is the best time to have your 2nd child?

Experienced mommas, please help! My hubby and i are expecting our first baby in June and have been talking about when it would be best to have our second child. We are planning on having only 2 children. We've been married for 7 years now so we enjoyed our alone time and want to focus on a family. We are just not sure what the best age gap between siblings would be. Thanks for you thoughts! 

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