It only straightens over time if you overlap processes. If you wait until you have enough new growth to do only the roots you won't get straightened hair.
I only have my roots done every 3-4 months.
4a/b Texlaxed hair w/ highlights. Medium texture & high porosity.
HG's: CJ Daily Fix, Bobeam Cheris Hibiscus shampoo bar, KC Spiral Spritz, Knot Today, CJ Rehab, KBB LL Hair Mask, Cassia, KCCC, oil blend of Avocado, Camellia, Jojoba, & Meadowfoam oils
SL APL BSL MBL