Hi,
All of the sacraments are fulfilled when we are united to God for all eternity. The fulfillment of the sacrament of Matrimony is the union with God that it has prepared the husband and wife for. This does not cause a separation between the husband and wife; they become more united than they ever could have been on earth. It’s just that they are united with everyone who has become united to God in this way with a joy that is completely beyond anything we can imagine.
When considering heaven, we need to think outside of the box of what we experience here on earth. Heaven is all about God. Actually, our life here on earth is all about God also. But we don’t think in this way nearly enough!
Fr. Vincent Serpa, O.P.