I agree that he may have been over stimulated - they can go from seeming contentment to warning nips in a heartbeat. Is it possible he thought you were pulling a fast one on him and sneaking in a pet he thought was from your husband? My sons likes to try this with Fia, and when she realizes what he's doing she gives him a warning bite. I would tell you to always end things BEFORE he ends them. Stop before you think you need to, when you're still in the midst of a great moment. Leave him wanting more, rather than him tell you he's had enough. Also, I strongly caution you to not try to pick him up from your husband or right after he's been enjoying your husband's attention. If he's bonding more strongly to your husband and you appear (to him) to cut in on the action he may (probably!!) try to get you. I see this with Fia, and it really doesn't even matter who's been holding her - she lunges at the "intruder." It's always best to have an intermediary stopping point - the back of a chair, a perch, something, before the next person picks her up. (Or, I have a big distraction in my other hand - something she's not familiar with or doesn't like.)