How old is she? If she's 40ish, first sign of aging or diminish fine line stuff probably works. If she's 50ish, actual anti-aging or things that helps with hormonal aging/wrinkle would be good. My mom had great success with L'occitane Immortelle, Murad Age-Resurgence, and Shiseido Wrinkle Resist. I think there's kit out for all 3 lines, and suggest read the description and filter by age to figure out which ones are for you. Depending on how much she like skincare, an enzyme mask is gentle and helps with dry/dull skin, I think Ren have one for mature skin.