~first~ and ~second~, the fact that you both have an 8 in this part of the chart indicates you are well suited to support one another's endeavors, as well as start a venture together. You are both visionaries with imagination and a talent for business. However, you are also both driven to be in charge, and you do not like to surrender control. This may cause competition at times, which could lead to jealousy or anger. If you direct your strongly competitive natures against other forces, you have a good chance of a long and happy relationship, with the potential for financial prosperity as well. 

The 8 is a good number for business, but its tendency to risk everything in pursuit of a dream could bring either tremendous success or total failure. No other number is willing to ride a financial roller coaster like the 8. You will need to keep an eye on each other to prevent extreme risk-taking.

~first~ and ~second~, the biggest danger for your relationship arises if financial problems become sizable.
Being financially strapped will negatively impact all other areas of your life, including romance. People who share the 8 are driven to achieve material success. It is important that you follow your heart and your intuition in the pursuit of success - that is the nature of the 8 - but it is equally important that you keep enough of your assets safely set aside to avoid serious problems. 

Both of you understand the need for authority, particularly when it comes to raising children; however, this may lead to you be more controlling than most parents, which could be another source of trouble. When both parents have an 8 in this part of the chart, they tend to create environments where children are given everything they need (including plenty of love), but this is often accompanied by too much control, causing them to rebel. 

It is important that you understand your authoritative nature and recognize that your partner - and children - have their own paths to forge. 