Hot wife likes anal action,... post & enjoy

Married 25+ years. Wife wasn't into anal, said she tried it a few times didn't like it. We tried it 3 times, never went well. All good.
Befor I was married I realized some women were ok with it, some said no way.
Present day, we get with a guy we know for mfm fun sometimes. Took several visits to get comfy but it's good now. Our friend joining us has really changed our thoughts about sexy fun.
Anal is a regular part of our fun when he's with us. He's gentle and just takes a few pumps usually but there has been nights they get into it pretty good and he cums
 
My wife will take it in her butt sometimes and I like it but when our friend is with us it's completely different. When he's with us she gets really turned on and I mean REALLY turned on. She gets on all fours, he lubes them both up, puts his finger into her butt then gets lined up and slides in REALLY slow. The way she let's out a low grunt is damn sexy. She arches her back and she's either looking way up or way down and grunting. He gets all the way in and takes SLOW full pumps and she moans much different. It's damn hot to watch.
It's usually 10-20 pumps but he's cum in her butt a few times. When he's done and pulls out she says something like WOW or FUCK or DAMN. She takes a short break then one of us starts fucking her puss again. We mess around for 2 or 3 hours, we each do her twice with lots of trading back and forth lots of kissing, oral and just laying there naked.
We've kinda moved to after we each done 2 times they go downstairs for one last fuck without me before he leaves. I've watched from upstairs and don't think they know. They have a quick fuck then they kiss goodbye and he leaves. One night she got on her hands and knees, he went in from behind and I quickly realized he was in her butt. He started slow but got going pretty good, faster than I'd seen. She just took it like no problem. He pounded her butt hole till he unloaded. She just went with it. I was like DAMN. She's never said anything about it.
I've fucked her butt many times but she always says don't go too hard or fast. It's all good.
Watching him do her butt is insane exciting to watch.