Lesbian cuckold couple

My sister viv who not long arrived from newzealand who I’ve not seen in over 20 years ,at that time we were brought up as cousins until she found out she was adopted by my aunt as my real mom had her at 13 complicated story so she my half sister a lot to chat about,over the past few weeks her sexual lifestyle is on par with mine back home for what she told me so far probably more than mine.
.viv very fascinating very open two of her girl friends back hope have a strange relationship there married as lesbians but strangely bi sexual an have a wide circle of male female friends both of them enjoy men to there kinky way of sex is they cuckold each other which I’ve never heard of both would often go out and come home full of cum for the other to enjoy and acording to my sister she been at there house when one not long been fucked shown her partner her very wet pussy in which she given the cum to her,
viv then told me that they were with there regular young couple 15 years younger than viv with the two lesbians or bi lesbian in a 5 way when to other male friends turned up the girls disappeared to another room which left viv and her young couple having there own good time ,after viv friend husband had cum in them both there girlfriends reappeared and it turned out to be a pussy cum feast.

apparently is a regular thing with the two girls and viv has said very strange relationships but has on a number of occasions made her so wet she had uncontrollable orgasms by it, on one occasion her and her young couple made the husband cum so much the poor guy couldn’t get an erction for a few days ,I heard of lesbians reverting back to becoming bi but never two girls doing what they do