is ok to use wifes new make up brush to clean styius needle

Get the little box with sticky surface that cleans the stylus.  A soft brush will remove dust and lint that collects but does not do much to get the oils that come from your hands to the disc to the needle off with a brush.  Harder brushes, as often come with a new cartridge, can harm the tender parts and the cantiliever.  Use the cleaner and protect your stylus and immediate connections.   Chemical cleaners are available too but must be used with care.  The diamond is GLUED to the cantiliever and some cleaners can remove the glue and cause the diamond to fall off.  Using the sticky box cleaner every time keeps it pretty pristine, safe and playing great.

"Harder brushes, as often come with a new cartridge, can harm the tender parts and the cantiliever. "
A manufacturer supplies a brush to destroy its own product?Maybe if your heavy handed, and ill advised. If that’s the case, ANYTHING can ruin a cart cantilever.

I'm with Teo.  However, Last also make similar stiff brushes, sold with their stylus cleaners and preservatives, that probably work just as well as the one cited by Teo.

Presumably, your wife will want her brush returned, so she can use it for make-up.  Obviously, you cannot share that brush; it has to be dedicated to cartridges or cheeks.  Therefore, you save no money by using the make-up brush on your stylus; your wife will have to go out and buy another brush.

I use a v small artist brush and a magnifier:

Joe Miller Signature Series 50/50, Round, Size 00 JMSR-2-0Half sable, half nylon, fine stiff tip
An efficient way to keep a stylus clean is to play clean records.

The small brush that comes with LYRA STP, looks like a small painters' brush, works well. I haven't tried it dry yet.