Totally okay, mama! A few of us do it all the time, breastmilk in proper storage bottles or bags doesn't absorb odors or bacteria from meat if everything's sealed properly, kaya hindi ka mag-worry. Just make sure your milk containers are airtight and labeled with the date, at kung may meat juices man, mas safe na i-store mo ang milk sa upper shelves para wala pang chance of cross-contamination. Many of my mum friends actually prefer keeping theirs in a separate freezer section kung meron, pero hindi talaga kailangan if your freezer is clean and organized na.