That sounds pretty cruel, LOTF
Sometimes men get freaked out by the idea of babies...I have to say my second child's father was a bit confusing. He said yes, we could have a child, after I had said I thought we should break up because of us wanting different things. So it was all fine, I got pregnant, and suddenly he was a fruitloop, swearing, panicking, marching me down to the FPC to arrange a termination when I hadn't eaten for 3 days due to morning sickness. It was hideous.
Sorry I am rambling but men can be really odd about it if they feel they are 'permitting' it, iyswim? Maybe the 'accidental' incident last month made him think it wouldn't be his 'fault', and as soon as it comes down to actually deciding about another baby, he gets cold feet. That seems to be a common pattern among all my friends' husbands!!
The just don't want to sign on the dotted line, but if it happens by mistake, they are Ok with it. Does that make any sense?