Is It Safe To Have Sex After A Coiling?

my partner has had a brain aneurysm and coiling done. stayed in icu for 18 days because of vspasm. he has been released and at home for a week. he is talking about resuming sexual activity. when is it safe to have sex after a coiling? he is staying awake alot more but still gets tired quickly, but thinks he can get back to normal already. shouldn't he be resting alot and not trying to do everything already.