I have a Sig 225 as well and it is a fine gun. The only drawback is it may be on the upper limits of weight and size for a woman to carry concealed. There are a lot of fine hand guns. I carry a HK but they are quite expensive. I would suggest going with something DBL or DBL only and no external safety. Less to have to remember. If you have a range that rents a variety of guns that might be a way for her to try different ones.
By faith Noah,being warned of God of things not seen as yet, moved with fear,prepared an ark to the saving of his house;by the which he condemned the world,and became heir of the righteousness which is by faith Heb.11:7