Second fiddle

[Bt45]

We are married nearly 20 years. Happy marriage generally, 4 great kids. Both busy professionals.
For understandable reasons our sex life has had its strains. Mostly due to having young kids.
During this time I was generally always sexually frustrated and tried all the usual things to spice things up. Sex toys being one of them.
Thankfully now the kids aren’t babies anymore my wife’s libido is coming back.
Our sex life is back to reasonable level and I really really enjoy intimate time with her, she cums most times.
Occasionally though she will brush off my advance and will use her rabbit vibrator the following morning when the house is empty instead.
I find the thought of this really arousing, my worry is that she is enjoying it more than me.
Is there anything I should do?

How do you know? I find it odd that somebody would tell their partner they'd just had a tremendous wank, after turning partner down...

We have a lockable box to keep the rabbit vibrator in, this and the overflow of her clothes have found their way into my wardrobe. I am observant and can tell when the box has been taken out and put back in.
I am paranoid that she will choice this over me more and more.

If you started thinking this much into what I was doing, I'd get the rabbit out aswell

Presumably you masturbate on occassion as well. Does that mean you're going to eventually choose your hand over your wife? Almost certainly not, so why should she be any different? Give her a break and if she feels the need for a bit of "me time" accept that is her business and really nothing to do with you as long as your sex life is otherwise ok, which you seem to be saying it is.