The only way the reflection can be stronger than the light it reflects is if there is some lensing effect which focuses a concentrated beam. Pretty unlikely unless you're putting foil on a round, convex surface. Foil tends to wrinkle and fold which disperses the light more than a mirror might.
Even here with a really bright location (SW exposure, hours of afternoon sun every day) the house plants do tend to lean. For what it's worth, I turn my house plants (all succulents) 180 degrees when I water them, which might be every 1, 2 or 3 weeks. A couple of them grow a bit of a stem and I might turn them whenever they seem to be leaning. Either approach works.
I don't use foil to reflect light onto plants but I do use it to reflect light away from the containers... around the outside of the tray where my smallest pots are, I put a sheet of foil to reduce the amount the sun ends up heating up the soil.
