Two hours is 2x ?one hour. As they have booked an hour, then during the session they ask to extend it's only reasonable. Unless you advertise a discount for two hours and that they have seen that pricing detail. Even if they have, you can say 'old ad' and hustle for the full fee, dropping back only if they decline.
On my pricing:
One hour is ?one hour (obviously)
Two hours is 2x ?one hour.
But, three hours is only 2x ?one hour plus ?50.* And includes desert.#
See what I'm doing there?The idea is to get them to compare 2 hours to 3 hours,
then realise 3 hours is only a little more than two hours and go for that.
Which is brill when they then only stay 90 minutes.
*The actual total ?amount for three hours is actually an amount I am happy to receive in exchange for a three hour session. The two hour and one hour fee are worked backwards from this.
#Desert is a teaser to make them think the low price for three hours even includes something special. What desert is can be up to you. Wind-down massage, double showering, key fob with your ad photo and phone number
You decide. All marketing