Hi! It’s very normal that baby is close to main caregiver. And the fact that she cry for ur mil means ur mil is doing a good job & she likes her, which is a good thing.
On the other hand, what you can do is to spend more time with her after work, (bathe, play, feed, put to bed) & during the weekend (whole 2 days). They will know who’s the mother and wants you.
My girl is in Ifc and she love her teacher & gg to sch. But whenever we fetch her home, she will be very happy and stick to us a lot. So I think bonding really helps a lot! Even with the short amount of “awake” time u have with ur baby during weekdays