If these two can BOTH muster up enough courage to come out of their shells, they will discover soon that marriage is something that they both want. They will usually want to live together first to see how that goes, but it won't be for very long before you hear wedding bells.
I'm getting way ahead of myself... Let's back up. These two really love protection, this is why I brought up the idea of marriage so soon in my post. While it scares the socks off of some, for these two it is a very important part of life. Tradition and home life are at the core to these Water Signs. These two will have a lot in common actually. You will see photos of family all over their home. They will also have many things that are nostalgic around them. The cooking in that home will be as good as any restaurant too. He will love making money to support their home, and she will too.
Sounds heavenly huh? Well, may I remind you of the moodiness of Cancer. Now multiply that times two. Sometimes there will be a reason for the melancholy, sometimes not. They will have to learn to live around it. They will both be emotional, and at times one will be emotional about the other being emotional. It can lead to a hot mess, but to them it makes perfect sense.
These two will want children, but they will have a very very hard time letting them go. Especially to go off and get married. Whoever marries this double Cancerian couples child will have to be perfect for them to accept it. Security in every sense of the word is so important to these two. I would actually suggest that they keep some money separate from one another so that Cancer claws stay at bay. Money is a big issue for Cancers, and they all see how to use it in different ways.
These two love to play guessing games with each other which can either be fun, or harmful. They are not inclined to share every emotion, desire, or feeling right upfront. They will conceal desires, even when it comes to sex. When the games are over, their sex will be satisfying with a feeling of security. The first few times they make love to one another, there will be a lot of shyness that both of them need to overcome. Then, just like the moon, they will go into a phase of wanting a more open and deeper sexual course. Infidelity is very rare with these two, so once they join together it remains permanent. That is if the security is there. If one of them starts to lose their security (financial or emotional) for the other one, it will never work.
They both also love to keep a good secret. However, they will not like secrets being kept from them. One thing they will need to work on with each other is to be more open and honest with one another. The littlest things can make a Cancer worry for no reason, so reassuring each other on a consistent basis is key to happiness for both of them. These two have a great shot of finding happiness in love and in their home. They need to remember to keep their claws away, and treat each other with love, understanding, and nurturing. Under the moonlight these two become magical. Together they are something even more.