All of us dads go into dad mode all the time. The difference is that dads in dad mode can usually switch right out of it in a nano-second. Most women that go into mom mode can NOT do this. Once they get into mom mode, getting out of mom mode is hard for them, and in my wifes case, she has not left it in 18 years.
But you suck it up and do it. If you happen to get a quickie while on vacation, its a perk not a right or obligation.
I have been sucking it up for 18 years, I have raised 3 boys, the youngest of which is 11. I never said that sex on vacation is a right, the problem is that it is almost never even a perk. Even when on vacation ALONE with my wife, specifically to get closer to her, she does not want sex, even gets a little miffed if I ask for it. My wife see vacation as time to do what SHE wants, not to do what is good for US, but that is the way she lives her life, doing what is good for HER, not for US.