Second set of slimes will spawn with second set of slugs, it is a repeat of the start of the phase. (Slugs > Acid Raid) Make sure to stack properly for this again, you don't want slimes on top of boss and getting hit by a stray aoe.

However unless you have a lot of deaths/dps is really low, you should kill her well before slime debuff gets high so you can still just kite slugs and kill her without worrying about doing a second round of feeds.