congrats for the 2 J seats!
for your information: companion awards are only possible in Eco.
the day flight is somehow managable in Eco, the return flight is really a pleasure in J, also because it is one of the longest flights in ABīs network.
you can try to request an upgrade about 8 weeks before the flight - thatīs the time they sometimes release more seats - at least to their Tier members. Otherwise, you can go for an ad hoc upgrade, however be aware that a higher amount of miles is required for an ad hoc upgrade at the airport (likely only possible in DUS, eventually in TXL)