I give my cat wet food (85 grams) twice a day but my cat asks for food even in the afternoon or before meal time (so can I feed her in the afternoon also means can I feed her three times a day)

You can space out her meals and give her 3 smaller meals instead of two. Make sure you are feeding the correct proportions based on specifications on the pack. Wet food has around 85% moisture on average, so they usually require more of this to fulfill their requirements in comparison to dry food which is calorie dence. Don't leave the wet food out for more than 20 mins it gets spoilt easily, after opening a pack store the remainy food in an air tight container in the fridge to avoid spoilage.