Yup, the combinations are almost limitless with these fine ladies totally-not-related
Yummi yummi thoughts about combinations like Erika-Eva-Norah, Emma-Amanda-Martha, Amanda-Eva, Emma-Erika, Eva-Emma-Erika-Amanda (this one could be piping hot) warming up and entertaining each other while Mark is focused to pleasure and get pleasure giving his Rod of Asclepius to each of them, one at time
I escluded Daphne just because she wasn't interest until now in exploring lesbian content (not even light as Erika do), maybe she will have a change of heart (but I don't think so, still I have no doubts that she will get her threesomes-foursomes with the rest of the girls but interacting sexually only with Mark)
Not really a fan of strap-ons though, wondering if some of the girls are kinky enough to try using one.