Regular sex after starting prostate play?

Couple of years ago my wife started giving me prostate massage with her fingers whilst giving me BJ. This was on her initiative, as she’d been chatting with colleagues about sex habits, and wanted to test it with me. Safe to say - I liked it from the start!
After 6-7 months we just kinda stopped it and returned to normal sex again.

Then, a few weeks ago when having the regular sex, I got a semi, which she cured with some prostate play. After this, I’m on a rolling streak of pleasure - and to my surprise - she gifted me a prostate vibrator for my birthday, and have steered me towards activating myself with anal play.

She’s working night shifts at the local hospital, leaving me no other choice but to play for hours almost every evening. I definitely feel an awakening, and I’m glad that she’s supportive and pushes me to do it.
Our sex has been a lot less frequent over the past years as we’ve gotten kids, new management positions , bought a larger house and garden etc, causing her more daily stress and lesser sex drive. If it was up to me we’d still have sex every day.

I guess my main question is: How do you keep up with the regular sex besides the prostate play? And do you think she’s doing this for self-pleasure or just to cut herself some slack from my desires of more sex?