That's the point she was in love with Axel too, or am I wrong? If she was in love with Axel than LenaxAxelxCherry threesome did happen.
It doesn't cancel the whole scenario if Chad Ian doesn't like footjob, It simply prevents the revelation. example: If my friend is on a date with a girl he smashed, it doesn't matter whether I like to hear or not that he smashed or not but the fact will remain unchanged in every scenario. This is happening in that footjob scenario we are given choice whether to hear about it or not. Simple as that.
Let me make it more clear
- If LenaxAxelxCherry threesome didn't happen than Lena breaking with Axel will make less sense than if she did threesome bcz she felt betrayed when she trusted Axel and let Cherry come into their bedroom. (Here I believe LenaxAxelxCherry threesome did happen)
She was in love with Axel and was in dom(Axel) and sub(Lena) relationship,
Ivy mentions it when Lena, Ivy and Holly when shopping when they browse collar so it clearly states the fact that Lena wasn't in "vanilla" relationship with Axel(there is no check for Ivy's comment IIRC). So, threesome did happen.