Good, It's bigger.
What you can do is, in effect, make a clone of her tank with yours. Remember that the important thing is the bacteria. You will be taking some from her tank and putting it into yours where it will establish itself an multiply.
This bacteria is all over everything in the tank. It is in the gravel,in the filter, on the glass, on the plants, decorations and floating in the water.
This is what I suggest you do if she will let you.......
Empty your tank and put the fish in a big pot or something while you work on this. Then take gravel from her tank and put it in yours. You can replace about a third of hers with yours. Do not wash it. Put it ON TOP of your gravel. Then fill your tank with about a third of the way with water from her tank. Fill the rest up with dechlorinated tap water.
Then, and this is important, take some of the filter material from her tank and put it into your filter. This is loaded with bacteria and it will distribute itself throughout your tank.
Do not let anything dry out while you are doing this or the bacteria will die.
Put the fish back in (check that the temperature matches) and then monitor the chemistry with your test kits.
This process will give you a BIG jump start on the cycle. If you have added enough bacteria, you may not even have a cycle. And it will not harm her tank at all. The bacteria will just reproduce itself in both tanks.
Good luck and keep me posted on the results.