As long as the course you pick has a set of Ladies tees then you are ok. Not all courses will have all tees. Some times short tees may just be called forward so you may need to change her preferred tee just so you can play that course and force her tee to be the shorter one.
Once you do that then just set up the solo round with "any" as the tee choice. This way as long as that course has her preferred tee she will be on her tee choice and you will be on your tee choice.
Just know that it used to place a person who's tee choice was not a valid tee for that course, at the longest tee. Again just adjust a players profile for that one time when needed.
One way to see what tee's are available is to use the OGT Forum and search courses and record what tees show on the score card. Another way is to just start a solo round and once you pick a course just scroll through the tee options and see what they are called for that course. If you pick a tee there, then all players are forced to use that tee. If you select "any", then the preferred tee is pick as long as it is a valid tee.