Booty Calls occur in The Ballad of Gay Tony after the player impress a girl at Maisonette 9 by dancing with her, if the dancing mini-game doesn't take the player to the Bus Stop mini-game, Luis and the girl will have sex in one of the stalls of the women's bathroom.
Afterwards, she will give him her number and tell him to call her.
When the like meter is full, the player with have the option to ask the stripper home, however only half the strippers will actually go home with the player when their like meter is full.
There's also a couple of extra booty calls obtained from completing other game activities, like random encounters or private taxi fares.
Therefore, to answer: what you've received is most likely spam.
A quick search for found that they've used several Florida-based Google Voice phone numbers to spam random cell numbers with the message, "Hi I put a pic on my page on just sign in and check it out ;-)".
Rather, I want you to take responsibility for your own actions. What if, it was only within yourself that it could possibly change?
I had one from which transfers into a sex website (porn pics, etc.) and I never have been on one of these in my life! I am afraid my boyfriend is lying to me." My first reaction was to ask the reader for more information to clarify her situation.
All a spammer has to do is buy those emails or cell phone numbers, and then blanket message them all the same thing. I strongly suggest focusing on a solution to this issue, instead of thinking about what your boyfriend did in the past.
In this case, that might include getting the number blocked, having a quick discussion with your partner to let him know what's happened (and showing him this blog post), and finding the positives in the situation - such as you finding the text before the kids did. I get spam of all kinds on my phone, even when I'm not signing up for random dating sites to review them.
Someone with a different history - say, a girlfriend of yours - would get different treatment from you, yes?
If they had dating spam on their phone, would you assume they were using sex sites to meet someone?