Then

Are these sentences correct:

1-She and her then boyfriend were invited to the party.
2-She and her boyfriend at the time were invited to the party.

3-She and her then boyfriend will be invited to the party.
4-She and her boyfriend at the time will be invited to the party.

5-She and her current boyfriend will be invited to the party.
5-She and her current boyfriend at the time will be invited to the party.

1 and 2 refer to an event in the past.

3, 4, 5 and 6 (very odd sentences) are supposed to refer to an event in the future. They are supposed to mean:

A-She and whoever her boyfriend will be at the time will be invited to the party.