Wouldn't Brambleclaw have known Leafpool's kits weren't his?

[meowkitty]

So this has been bothering me for a bit... Wouldn't Brambleclaw have known? Female cats can't give birth without having a male cat.. Brambleclaw would have known the kits were not his, unless Squirrelflight had a miscarriage. Do you get what I mean?

[pandapower712]

Brambleclaw actually did know, but he pretended to act surprised.