Maybe baby 3

My husband has always said hes getting a vasectomy after baby 2 didn't want anymore kids but I kept pushing for more I'm gonna be 25 this year and just this last week we're having sexy time and usually he always pulls out cause I no longer have an iud cause my body was rejecting birth control. This last time he didn't even pull out or anything he literally finish in me and we have done it 3 times already just this last week and I'm curious on what changed his mind cause I told him that if I just have the 2 by the time I'm 30 I'll be fine cause deciding on having more kids should be an agreement for the 2 partners and I'm happy but I'm curious why the change of mind.