This page contains all the information you need on how to complete the romance with Jacob.

Once you’ve completed the necessary steps to beginning and building the romance with Jacob which can be found here, How To Start Jacob Romance. Continue speaking with Jacob after each main mission and say the following, “How are you, lover?” followed by “I do” to secure in this romance. Finally, intiate the Omega 4 Relay mission and Jacob will appear in your cabin and you’ll want to say “About time you got here” to engage in a intimate moment with him