"You will still do a cum swap"

I whisper back to Millie.

Ashley is still in her throes of orgasm, so is still moaning, so does not hear what we are whispering, nor does she see that both Millie and myself are using our fingers to collect the cum from Millie's big tits and putting it into Millie's mouth.

Once we are finished, I move aside, and Millie leans forward over Ashley, and kisses her on the lips very slightly. Ashley opens her mouth to fully kiss her mom, and as Millie opens her mouth to kiss Ashley, the cum dribbles out of Millie's mouth into Ashley's mouth.

Ashley at first let's out a little surprised yell when she tastes the salty liquid being dribbled into her mouth, but then she realises that her mother is sharing the cum with her, and they keep kissing for a while, a bit of cum running slowly down Ashley's cheek.