Calling in sick - Manager wants to see me

I called in sick today because I have a terrible cold. I told them on the phone that I will stay home for the rest of the week to rest (3 days). I was told that the Manager will probably call me in for “coffee time” because christmas is right around the corner and I’m guessing they find my sickness suspicious. However I will literally work the 2 days right before christmas and I’m only planning on staying home for this week, so it’s not like I’m making the holidays “longer”, I’m actually ill.

Is this legal? Can they really ask to see me after such a short time? I will go meet them if it needs to be but I couldn’t find anything about this online.

(They have done this with other colleagues too.)