>>27863
Yes, that's all fine ;)
I hope you do not absolutely insist on the exact concrete wall and something with the same functionality will be ok since this is not usual accident/trap but deliberate setting also, hands will be left free for story purposes ;)
finally, do you prefer very highly willing girls who fight for who gets most attention or the reluctant type who try to divert your attention to each other. I think later will be preferable for more interesting story.