*pushes glasses even higher* That rule specifically only applies when you use a bonus action to cast a spell. (Rules link).
Two leveled spells using your actions are fine.
Here's the relevant sage advice to confirm.
While the sage advice doesn't address leveled spells in action/reaction (e.g., fireball and counterspell) in the same turn, we can assume it is possible as no bonus action is used.
… are you proposing a sexual cone “attack”?
( consent first last and always)
Such a spelled with maximize efficiency at orgies.
For instance, it apparently took comedian Grant o Brian, 3 to 4 hours to suck 50 dicks. ( this was in a party underneath the supermarket in Brooklyn in 2012. It is unclear whether or not it was his birthday. There was a snack bar.)
In any case, and oral variant of such a special less, you propose would allow him to have done it in a fraction of the time!
Thank you so much for your comment and I hope you’re having a great weekend.