[JustSkipIt]

It was an immature - but there wasn't any malice behind it. Using your mouth as a water pistol is gross, but not an act of hate and contempt like spitting.
Bea, as always, totally over reacted.
The OP sounds like she stayed quite reasonable, but the full exchange was quite different. She kept repeating how offended she was by Charlie's act, told him how a housemate had been expelled from a past show for spitting and how he must never NEVER do anything like that to her again long after he had apologized.

If it had been anyone but Charlie I would have felt sorry for him, but I both he and Bea had been trying to goad Rod into a tantrum so my sympathies are limited.