^Yay! I'm excited for you and your hubby.

Glad you got an apartment in Montmarte, such a lovely place!
Since you are asking for feedback in your IT, here's some that I can suggest:
Day 1 - Coming from a long flight suggest don't cram too much activity on this day. Since you will be staying at Montmartre, you can visit Place du Tertre and Sacre Coeur first. This will then free up your late afternoon coming from Lisieux (balitaan mo ko dito ha. I've always wanted to visit St. Therese's birthplace but never had the opportunity.)
From Sacre Coeur, take the metro at Anvers (line 2) direction Porte Dauphine and get off at Charles De Gaulle Etoile. You have two options here:
1.) Get out of the metro and visit the Arc de Triomphe. Or
2.) transfer to line 6 and get off at Trocadero.
If you take option 1, after the Arc you can walk along Champs Elysees and turn right on Georges V. You'll end up at Place de l'Alma where you'll find the Alma Memorial to commemorate the Battle of Alma during the Crimean War but after Princess Di's tragic death at the tunnel it was informally turned into a memorial for her. Across the memorial you'll then find the terminal of Bateaux Mouches. The boat ride takes about an hour and 30 minutes.
If you take option 2, get off at Trocadero and you'll end up at the plaza where you get the iconic view of the Eiffel Tower! From Trocadero, cross the garden to get to the Eiffel Tower. But if you're not climbing the tower on this day. Hop on the metro line 6 direction Charles De Gaulle Etoile.
Walk the Champs Elysees all the way to the Louvre. In order of attractions you'll be passing: Grand and Petit Palais, Place de la Concorde, Jardins des Tuileries and finally the Louvre. You might want to take advantage na rin of visiting the Louvre on this day since it will fall on a Friday and they close late at 9PM.
After a full day, go home and rest up!
Day 2 - After a good's night rest. Be a local! Buy a baguette at the neighborhood boulangerie, cheese and milk at the cremerie. Breakfast! Gotta load up since it's going to be a full day.
- Notre Dame! Tower then church.
- Instead of going to Passerelle des Arts which is all the way at the Louvre, you can go to the Pont de l'Archeveche just behind Notre Dame. Pareho lang naman silang maraming love locks. Actually halos lahat na yata ng mga bridge across the Seine na malalagyan ng padlock nilalagyan na ng mga tao.
- Saint-Chapelle (my favorite!)
- Conciergerie (I hope they're open na by the time you're there. It was closed for renovation when my sisters and I were there in October)
- Pantheon (this is already part of the Latin Quarter)
- Jardin du Luxembourg
- Might as well drop by Saint-Sulpice (near Jardin Du Luxembourg). If you read Dan Brown's Da Vinci Code, according to his book this is where you'll find the Rose Line.
- Eiffel Tower at night. Wait for 8PM that's when they start the light show.
Day 3 - Mass at rue du Bac chapel. Say hi to the Pinay nun/s manning the cashier at the souvenir shop.
- Musee D'Orsay
- Musee Rodin
- Hotel Des Invalides (Napoleon's tomb)
- Cross the Pont Alexandre III
- Opera Garnier
**For the Eiffel Tower, try booking online thru their website so you don't have to wait in line for long.
Okay yan na muna. I hope this helps.
