Armpit sweat won’t cause problems but please be careful ingesting deodorant. You may want to have her wipe it off before engaging, have her shower, or have her not wear any deodorant at all that day (if you’re staying in). Consuming deodorant can be dangerous! Sincerely someone who has a long history (~9 years) of educating others about safety and harm reduction with a specialization in bodily fluids play