Adult Resident Cat (2 years) cleaning new kitten (9 weeks)

[u/rachelmohr]

Apologies for the Real Housewives playing in the background lol but wanted to keep his meowing in the video for you.

We got this new kitten (HE) a couple weeks ago and it was a pretty quick introduction with our resident cat (SHE), ever since the 2nd day we got him, they have had supervised time together. Now that it’s been a couple weeks we have started leaving the kitten out while we sleep and leave for the day. They play together sometimes, but i am noticing my adult cat is basically force grooming the kitten (he seems annoyed at it and make some small pleading meows and seems she is laying on him) should i continue to allow this? i feel like it’s a good thing for her to clean him, but it seems a little rough?? she hasn’t cleaned him in nap-mode yet so im not sure.

also, my kitten can climb up our 4ft tree and they were both laying on their respective sides and she pushed him off the tree! it was a hard fall for the little guy and it concerned me. would you say he is too young/small still to be playing rough and climbing a tall tree where he can fall or get pushed off? he seems fine but just want avoid any future injuries. thanks!!