when i let my friend join us

hey everyone, so i've been in an open relationship with sara for like 8 months now and it's been great. we have this thing where we can date other people as long as we're honest about everything and keep the lines of communication open. totally works for me. but recently this guy mike started showing interest in sara too, he's kind of cute and we all hang out sometimes but no one thought anything would happen between them until a couple weeks ago when they both admitted they liked each other and wanted to explore that as a thing. so now here i am, seeing two people simultaneously. it feels weird honestly cuz before mike came into the picture sara and i were like our own little world, just us and no one else mattered much. but mike's cool and seems genuinely into both of us which is nice bc we all get along well. the thing is last night we decided to try something new - me, sara, and mike hanging out as a trio for the first time. at first it was just us talking about everything like normal but then things got heated real fast when our hands started moving around touching each other's bodies more than usual. i was the one who suggested we take this further right there on the couch while sara and mike were still debating if they could do that. so i basically grabbed their hands, told them let's not overthink it and just feel each other out for real. and then before anyone knew what happened my fingers were inside both of them at once, sara spread wide with her legs up on either side of mike while he leaned forward to lap at her clit as my tongue went down into him too. we all just kind of dove in without another word. it felt wild and chaotic but also amazing - having two bodies reacting underneath me like that was intense. after a bit i switched to sucking sara's fingers while she pounded on mike who made little whimpers of pleasure and then they flipped and the same happened again but this time it was her tongue on him as he rode me. anyway i just wanted to get all this out there since it felt kinda taboo even if we're in an open relationship. so am i being selfish or cool by going along with this? did i ruin things by pushing them into something too fast? let me know what you think