Should you step in a stop play fighting?

Archie is 1 and weighs about 8 kg, Bramble is 9 weeks old and weighs about 1 kg! They do play nicely but sometimes Im not sure if its going too far.

Archie starts by nose butting her and rolling around (as he does with toys). She comes back at him and bites ears, etc all this is accompanied by growling & groaning (from both of them but sometimes yelps from Bramble) usually their tails are wagging.

I don't know whether stopping them will make Archie resent her (for spoiling his fun) and obviously don't want either of them to get hurt.

Grateful for any advice