Anal surprise for BBW wife

We had an empty house for a rare change last night and I invited our MFM friend over without telling my wife. She was lounging around expecting to just stay in and watch some movies for the night when he dropped by. It had been quite a while so it was definitely a surprise for her "so you guys make secret plans behind my back and think I'm just gonna let you fuck me?" I said I just told him to stop by and watch a movie she got up and got herself a drink. When she walked back in she leaned over to sit her cup down and stuck her ass out "you can see right through these leggings and I dont wear panties". We we're both obviously staring at her ass and getting hard she looked back with her ass poked out "you can both jerk off on my ass if you'd like". We did for a few minutes before I pulled her leggings off and spread her ass. I told her we planned on only fucking her asshole tonight she got on her hands and knees "I guess im just a little whore cus that sounds like a lot of fun". We stripped our clothes off and I held her ass open while her slid his big cock in her. We spent 2 hours edging in my wifes tight asshole she was exhausted when he finally blew his load deep inside her ass then I fucked her messy hole and emptied in her with his cum all over my cock and her ass I have no clue how many times she squirted by the end. I think we need to plan more surprise threesomes it was so dirty and hot