Should we run this intimacy?

My partner is nearly 32 yrs old woman with an 8 months old baby of her ex-husband. Whereas, my age is about 24. We have been live together for last 2 months at Ohio. I am an entrepreneur and she is working at a baby care centre. We have good understanding and plan to marry to next summer.

During foreplay or another time when we make intimacy, I drink her milk lot of. Of course, we first ensure that our baby get enough and then me. She also enjoys it and informs me that breastmilk is also good for adult. Currently, we enjoying that 2-3 times everyday.

Is she right? Is it common or rare to other couples? Is this trend natural or weird? Is it should making everyday? Should we run this intimacy?