The composite Moon in the second house indicates that this relationship will bring out the needs you both have for emotional and material security. In fact, you may have come together because of those needs.
You will have a strong sense of shared values, which will help to reinforce you as a couple against the outside world. Because of this shared feeling, your relationship will grow strong even when there are considerable difficulties between you. But the need for security could keep you together even when that is not the best solution for either of you.
Particularly if this is a marital relationship, you might be trapped into staying together because of what you own rather than because the relationship is working well. Like everything else, possessions must be kept in their place.
Nevertheless, the security that this relationship can offer should be one of its strongest points and should help keep you together when the going gets tough.