After the cum swallowing

"Mmmmhhh" that was tasty, Millie says and laughs, then adds:

"Swallowing cum is supposed to be good for your health I have read."

I sit there in a bit of a state of shock, but quickly realise that I want to seem grown up and mature in this situation, kind of like this is perfectly normal to me that things like this happens, so I say:

"Yes, I have read similar things." Nodding my head, trying to seem serious.

Millie starts to laugh, gets up from the sofa, then says:

"I will be right back, just going to mix some drinks for us."